@neilk Same here! The group of my previous previous apartment building was the only redeeming activity in Facebook I've experienced in the past 12 years.
I want to say Discourse (web forums are ancient tech by now!) but I've been toying with the idea of a Signal group for the same purpose. I've heard of friends using Signal groups with very diverse groups of people already. It's only going to be ok for very low amount of traffic, like occasional announcements which elicit few replies if any.