I'll get to the downsizing question second.
Firstly, @Sago1 why no social life?
This is a very long answer.
I don't remember the figures, the last census showed a very high proportion of older people.
This is a place people retire to.
We moved here 8 years ago.
We moved for the good schools, low crime, quality of life, fresh air etc.
It is one of those naice 'executive' estates (according to locals) of only about 30 houses, all detached. Built like a village between three less desirable, but still nice IMO, small market towns.
All three towns would be considered rural, which makes us very rural.
We have a small shop, think Tesco Express. And that's it for 3 + miles in either direction.
The nearest big conurbation is 25 miles away, going to a group there after work would have been impractical.
The commute made it a non-starter.for post-work hobbies.
There's no night life and not much wrt evening classes, groups, or similar in the small towns. I often Google yoga classes, the nearest one is 12 miles away.
Again, impractical.
All of our neighbours are 20+ years older than us, or 20 years younger with small children.
There is no-one near our age here, or with much in common with us.
We do get together in the neighbourhood,. They are great neighbours, but friends? Not so much.
At the time our DCs were old enough not to need wraparound care. They were at, or approaching, GCSEs and A Levels.
We spent a lot of time driving them around.
So no playground parent-friends.
And not much choice to socialise.
DH and I were both working long hours, we were pushing our careers while we still could.
Both of us managed people, difficult to make work friends in that situation.
Over the years we've been here I have had some friendly friends IUSWIM,, but they weren't deep friendships.
Some people you just 'click' with. That hasn't happened here.
Then I was ill. The chemo was punishing, at one point I didn't get out of bed for months, other than hospital visits.
If your friendships aren't that deep, those people fall away when they don't know you very well.
It was cancer, it was serious, my family wanted to be with me.
Around the time I got better we had lockdowns, social distancing and I was still considered to be vulnerable. Unlikely to find a friendship at that time.
I do have a handful of old, old friends. They are scattered all over, I don't see them very often, maybe once or twice a year.