I grew up in a townhouse half of my childhood, my parents still live in that house. I’ll address some points above and some others not covered.
We took care of our own lawn, but it was a very small lawn. Neighbors actually have done it for my parents as a favor for the last 30 years. My mom does compensate them for doing it, but they aren’t charging her anything. Lawn care being included or not has to do with the specific community. Same with whether exterior paint and roofing is covered or not.
Since we were part of a master planned community/town there was well planned green spaces, community pools, walking and bike trails, and part of the trade off was the houses didn’t have much land. It was great as a kid, and my parents liked not having to care for a big property.
We never heard our neighbors through the walls. I’m pretty sure we had fire protection if some sort between the houses, I think it was a state or county building code. Not that the fire can’t jump if there is one.
It can be more risky to live in a townhouse regarding property value if your area is mostly single family homes, unless there is a specific advantage, like an incredible location. Walking distance to downtown, or an incredible view on the water, etc.
A townhouse can be a way to live in a great area for a lower price, because typically the thing that makes prices high is the land value. Where I grew up there was a lot of townhouses. I’m not sure if the ratio of townhouses to single family homes. The whole town (I think there is 40,000 people living there now, it’s not small) is in a downward turn right now of it’s life cycle, but hopefully it revives again. It’s still beautiful, convenient, and most towns go through this sort of thing.
My parents home is 50 years old, they have lived there for 41 years. With a townhouse you can’t easily tear down and rebuild like you can a single family after many years, so I’d say think twice before buying a very old townhouse, but as far as living in a townhouse I had no problem with it.
If it’s a townhouse or attached villa specifically for active adults, and one story, I think there is going to be more and more market for that.