Which real estate-related trends will Boston-area residents regret some day?

So much of the Boston region’s real estate, streetscape, transportation, and architecture is changing in so many ways.

There are new buildings, new sets of buildings, new transit routes, new parks, new conceptions of old facilities, etc. What’s more, there are trends, including gentrification and displacement, that have been accompanying these literally new developments.

Not all of it can be fantastic or even forward-looking. Which of these changes will Boston-area residents a generation or three from now regret? Which ones will our great-grandchildren look back on and wish they could undo?

That is our latest open thread. It’s not about pet peeves necessarily, but instead about which larger developments—of the brick-and-mortar kind and what they can cause—will have people sighing “why?” a half-century or so on.

• Boston’s 10 tallest buildings by 2020, mapped [Curbed Boston]
• 18 Boston-area developments to watch in 2018, mapped [Curbed Boston]
• Silver Line rolling into Chelsea in April as planned [Curbed Boston]
• Underground at Ink Block, Boston’s newest park, opening under I-93 overpass [Curbed Boston]
• Boston garage conversions: 6 major ones proposed or underway [Curbed Boston]
• Dorchester’s Uphams Corner due for major gentrification protection from city [Curbed Boston]
• 7 Boston-area neighborhoods everyone should be watching [Curbed Boston]