I've come to the conclusion that two things are necessary in old age. Love and a sense of humor. They are here in abundance.
I can't speak for all retirement communities. But here we've pretty quickly come to know a lot of people. Quite a number in their 90's. People who've led interesting lives. Who read a lot. Stay in touch with what's going on in the world. Respect privacy: Honestly nobody comes to your door or in any way disturbs your privacy when you're at home. But outside the door... totally different!
It is an understatement to say "we are happy here." Joy! Lots of joy. It's been a good move. A blessing! Far more than we ever expected.
I read recently that Joy is an infallible sign of God's Presence.