One of the things that would stop me downsizing is the very poor choice older people are offered when it comes to alternative accommodation. For 10 years I was a volunteer home visitor with Age UK and in that period I visited older people in all kinds of sheltered and family housing. In all that time I did not see one sheltered development, public or private, that I would want to live in.
Generally speaking the rooms were small and claustrophobic, they lacked storage, failed to take into consideration that older people have interests and hobbies and need space for them and completely failed to provide any space or opportunity for men, in particular, who had what I would call 'shed hobbies', woodwork, a little DIY or any think like that. Many had no provision for accommodating visitors, or it was in short supply and difficult to book. Kitchens were pathetic, it seemed to be assumed that older people were uninterested in food and lived off ready meals ate on their laps in front of the television.
I have only once visited a development that I would even consider living in. I have a friend who lives in Hartrigg Oaks in York. This is a development pioneered by the Joseph Rowntree Trust. My friend has a 2 bed bungalow larger than the average house. Both bedrooms are large and have en-suite facilities, Her living room must be around 20 foot long and she has a kitchen with room for a table. Crucially the whole of the roof area is one large, lit space, approached by a straight staircase that could easily accommodate a stair lift. The space is designed for those who do something with their time other than watch television. My friend is an artist and uses it as a studio, other people use them as libraries, studies, music rooms, sewing rooms and workshops or even extra sleeping space for visitors. She also has an outdoor area large enough for a shed. The bungalows are designed to be easy to get round in with a wheel chair or walking frame.