Having spent so much time and money building a home we loved it took a while to get out of our heads that feeling that downsizing was a retrograde step.
The DC seldom stayed over, the garden was becoming a chore, we were only really using half the house. It was silly to stay. It took a while to narrow down what we wanted/needed in a home which might "see us out". And it took two years of periodic clearing out splurges to shrink our possessions to a manageable level.
Now the DC love to come and stay - apparently they didn't before as they got upset leaving their old home! Luckily we like caravanning so the 'van acts as a spare bedroom when required. We now live in a small market town with all we need within walking distance. No pretty view - but with people chatting, children playing, an entertaining and interesting one. The house is so much easier to keep clean, bills are lower and I have time to sit in the garden rather than just work in it. I'm glad we moved while we were still fit enough to get out and about, join clubs and make new friends, and get used to our new community.