For me it is that there are a lot of dishes I'd like to make (that I know how to do) and a lot I'd like to experiment with. BUT ... there are only two of us. Oh, I can put together a dinner party quite easily, and I have a couple of shut-in friends who I bring meals to. But I don't have a large freezer any more. The dinner parties? I love to have people over, but cleaning before and after is a pain. Actually, cleaning after isn't a big deal, even w/o a dishwasher, we simply take turns doing a sinkful here and there.
Summer can be a frustration because my kitchen is not air conditioned. It really isn't THAT big of a deal, cooking out and salads work well.
Small kitchens aren't as bad as they seem when you've had both large and small. Believe it or not, unless you're someone who has to have the very latest in modern conveniences, sometimes small has its points. Especially if you are handicapped (I'm not, but have had many friends over the years with issues). I cooked in a camper trailer (not a mobile home, not a fancy RV) for three years and it really wasn't all that bad.