Mass timer buildings are prefabricated structures made of (hopefully renewable) wood. The pieces are made in a factory and then able to be quickly constructed together on-site.
This can hopefully greatly reduce the amount of carbon in the atmosphere from producing a building. The cost of producing buildings in this method is also going down. Additionally, these mass timer buildings are typically more dense than single family homes, which can lead to more sustainable communities.
The worst HOAs are in low density American suburbs. The most healthy communities are always high density working class neighborhoods - the sort that keep getting gentrified into oblivion because everyone wants to live there.
I live in a ‘high density working class neighborhood’ in a big dense city, and have for most of my life except some years I moved to a small village. Certainly not healthy, I would be even hard pressed to call it ‘community’. ‘Rat race’ or ‘crab bucket’ seem more appropriate.