I think you know the big things, and so much covered already. Some of these are quite personal to us (FIL) so please don’t take offence.
Do not retire to the country, or to a nice village where you think the community will rally round- they get bored pretty quickly and it’s a nightmare getting transport and support.
Swedish death cleaning, and a cleaner. Have numbers for a gardener and a decorator- not your DC’s job.
Try to remember that your working DC (with children of their own perhaps) have 24 hours in a day and just because they’re not at work does not mean they’re available.
Being deliberately filthy, and weaponised incompetence, is not unavoidable with age, and your family don’t enjoy spending that time with you.
Stay active- even when it hurts- you’ll rot a lot faster and permanently lose the ability to walk/stand/climb unaided if you vegetate.
Try to retain interests and friends so you’re not calling your DC every 20 mins though boredom.
Oh and cash in the bloody ‘family home’ your DC don’t want it, they want to spend the money on care so they know you’re ok.