I'd say Fuck the idea of making it cheaper to live forever in the exact house when you could downsize and make the home available for a family.
If the area was underutilized when they bought in cheap, they earned their windfall. I hope they didn't prevent apartment buildings from being built in their area.
Thank you -- this is a more concise version of my thoughts. If your house goes up in value, you just earned likely hundreds of thousands of dollars in the resulting windfall when you sell. Why on earth should I feel bad for you? I understand that communities change when this sort of thing happens, but pushing out the retired couple living in a multi-bedroom apartment for a small family is a healthier thing for the community. You don't want to freeze communities in time, they need to grow and evolve.