Me and my wife have recently moved back onto dry land after 14 years of living on board. This wasn't the original plan but my wife's arthritis deteriorated over the past couple of years and she no longer had the ability and confidence to get on and off the boat as easily as she used to. Also we bought a caravan in the Scottish Highlands near the coast a few years ago and loved it there so much that when I recently retired we decided to sell the boat and live in the caravan. That was 10 weeks ago and so far no regrets. It might have been a different decision however, had we not had the caravan to go to. As people have said, it is not always financially possible to go back into bricks and mortar.
I can honestly say that living where we do now, it more than makes up for not living on the boat. Although, it is possible that we may look for boat in the future for holidays. Of course, I could always take up 'lumpy water boating' as there is a sailing club not too far from us