In my area a lot of sheltered accommodation has been renamed retirement housing and I think that reflects the changes in sheltered accommodation offered by social landlords, who have had save money like local councils. I don't know if any have resident wardens any more, not that they're called that anymore. Private schemes offer more, but at a cost and you could find yourself paying for something you don't need until you're much older. My FIL and my DH's Aunt & Uncle live in sheltered accommodation run by two housing associations. This has given me an idea of what it's like.
My FiL is in an older building (about to be refurbished) and his one bedroom flat is great. Good sized rooms, plenty of storage, car parking - even Sky and cable TV connections. Good location for everything, including views. The kitchen and bathroom have been replaced since he moved in about 10 years ago. He keeps himself to himself and could be living in any block of flats. There's a part time warden. A couple of single tenants are still working and at least one lady is an active 90 year old. The rent is about £85 a week.
On the other hand, the Aunt and Uncle live in a modern facility which offers sheltered accommodation, a care home and a nursing home. Their one bed flat is very small and has an open plan living room and kitchen. They choose to be very involved in the activities on offer and the communal areas are lovely and comfortable. Most people look elderly and no one looks like they're still working. The rent is quite a bit more than £85 a week.
I would have no hesitation in moving in to sheltered accommodation like my FiL's as soon as I was old enough. It's a win win situation to me. However, I'm pretty sure the scheme the Aunt and Uncle lives in would make any younger tennants feel old before their time.
Smurf52 I would definitely suggest looking into sheltered accommodation in your area because it might give you the security of renting you need as you get older, whilst still enabling you to live an independent life. You only have to be old enough.