There's a reason we have all the checks and red tape that housing developments go through. Because once the developers leave, it's the Municipality that has to maintain their infrastructure.
I can't count the number of times I've worked on a subdivision project built in the 60s, 70s, and 80s, only to find a half dozen other problwms that we need to fix, at the cost of the City/Town, because it wasnt done right the first time.
Beyond that, those developments had no proper storm water treatment method, and now that we've successfully paved over half the swamps, we're realizing that untreated storm water wreaks havoc on streams and rivers and lakes. Now we've got to build to deal with that, another big cost.
Like no shit stuff was easier to do back in the "good ol days". They just didn't bother figuring out the problems that we're having to deal with now.