Jan Moir has summed it up perfectly for me today.
"During a life devoted to public service and being on almost permanent display, Lilibet was the one thing the Queen had that was entirely her own."
"It was hers, and hers alone."
"Spoken aloud, it was the affectionate nickname first bestowed upon her by her grandfather, King George V, adopted by her beloved father and mother, and an echo of the past that she must still hear, whispered down the hallways and by the firesides of Balmoral and Sandringham."
"It was also a private endearment uttered throughout more than 70 years of marriage by her husband who, may I remind certain parties, is recently deceased."
"Elizabeth may Regina, but Lilibet was something more sublime."
"No, it does not appear on patents or seals or official documents, but it was her signature on the most personal of correspondences. It was the cipher that spoke of the bonds of family and also of the flesh and blood woman behind the throne, under the crown, beyond the castle moat."
"Its use was restricted. It was a tender diminutive spoken only by those who knew and loved her."
"Lilibet was as much a part of the Queen’s personal identity as her Sunday hats and buckled shoes, her tweeds in the country and her cornflakes in Tupperware."
"And now it is no longer hers, its emotional exclusivity shattered; targeted and then blown apart like a clay pigeon. If we all instinctively understand its importance to HM, if even Noel Gallagher gets it — someone who is hardly a poster boy for the delicacies of family unity himself — why can’t Meghan and Harry understand the enormity of what they have done?"
"Thanks to their perhaps well-meaning but thoughtless cradle- snatch of the Queen’s childhood nickname, Lilibet has been devalued faster than a cryptocurrency."
"Once only used in intimate royal circles, now it is in the mouths of American TV hosts and radio shock jocks. It is on BBC bulletins and in newspaper headlines. It is the subject of furious legal letters and at the heart of an unedifying briefing war involving gloat and counter-gloat."
"Lilibet is now spoken of as a truculence, an affront, a protocol ram-raid, a misstep."
"The jury is still out on whether using the name for the new baby Sussex is a deliberate act of marketing strategy and self-interest or an innocent tribute from a loving grandson that has gone awry. No matter whose side you are on it is clear that whatever it was, it no longer is — its private significance lost forever to the braying world."
"When it comes to Lilibet, all bets are off."
"You have to wonder what the Queen must think of the loss of this term of endearment, on the eve of her official birthday and in the week that Prince Philip would have celebrated his 100th."
"She turned 95 in April, four days after burying her husband at Windsor Castle. Newly widowed and grieving, she could be forgiven for hoping for an extended period of peace and tranquillity in these late years of her life. God knows she has earned it."
"Yet through no fault of her own she is pitched from one Sussex-mangled calamity to the next."
"Poor Lilibet! She has conducted herself with impeccable discretion and good sense during a faultless 69-year-reign, but once more she is dragged into the bear pit by Harry and Meghan who somehow always do so much harm, under the guise of trying to do so much good."
"Baby Lilibet? It is the biggest case of name-napping since a friend introduced her daughter Apple to Mr and Mrs Gwyneth Paltrow, who then harvested the fruity moniker for their own child."
"What is puzzling is that if the Sussexes wanted to name their baby in honour of the Queen — and what a lovely thing to do — there are many non-contentious Elizabethan options."
"Heavens to Betsy! I lost count at 20, including Thea, Tess and Isabella, not to mention the lovely Scottish Elspeth and Ailsa, the French Elise plus a solid Beth, Liza with a Z, Busy Lizzie and Betty Boop to boot."
"But no, nothing would do but the one name that would do untold damage, the one name that should have been off-limits, the one name that anyone with a drop of sense would realise was personal, untouchable, just let it go."
"Like jewel thieves stealthily reaching in to unshackle the Cullinan Diamond from the grip of the State Crown, the Sussexes only wanted the best for themselves, the choice royal plum in the Windsor pudding."
"Despite their recent protestations about how much they hate the monarchy and all it represents, about how Harry felt trapped in his role as a prince and of his suffering because of the inadequate parenting practised by the Queen and bled down through the generations, here he still is, clutching at royal straws, determined to cling on to the ties that bind."
"Seasoned royal watchers know the use of Lilibet grants a dramatic royal presence in this child’s life. It also suggests the couple may want to associate themselves with the Queen and all she represents."
"HM’s duties are almost over, while theirs as a royal unit in exile are just beginning; an existence thronged with prospects and throbbing with opportunity."
"Even now, the Sussexes still don’t seem to grasp the essential divergence between celebrity and monarchy and that different rules apply, but they will take whatever they can get."
"The plunder of the name Lilibet was their solution to a complex problem of status and prestige, but the audacity might rebound on them yet."
But I don't expect those on here of the "no one owns a name" mentality to understand or 'get' the nuances of any of that.