You can't have Aldi and Lidl growing so much without a casualty elsewhere. In retail, it's all about displacement. The pool of shoppers and their spending power doesn't change much, so when new entrants come in, something/someone had to give.
Same with the whole high street, too, really. Online sales run to billions of pounds nowadays; that's all money that will no longer be available to spend in meatspace.
We all grumble about high streets full of charity shops, coffee shops and hairdressers; but with so much stuff where it's a known/researchable product, rather than a service or impulse thing - along with parking charges and restrictions - most of us find it so much more convenient to order so many things online instead.
I can see the balance tipping even further as the older generations, who have maybe not embraced the internet as much and only know/prefer traditional shopping, leave us. None of those of us who are confident and used to being online are getting any younger - so as we age and our health worsens, we will probably all clamour all the more for the convenience of the online shopping that we used to happily consider as an option, but which has now become a lifeline.
As for Morrison's, I'm another fan of their bakery - it's definitely one of the best of the supermarkets. Their in-store butcher seems more 'genuine' too, somehow. We used to pick up a cooked chicken from Asda on a reasonably regular basis, but they've recently moved to a new 'help yourself' unstaffed warming cabinet system at our local store, where the chickens always seem to be undercooked, so we don't bother anymore.