There were a few weeks of continuous passive aggressive conversations outside. I heard a relationship going to pieces in detail, without the chance to avoid hearing that. It was loud, it was specific. Now the neighbours do not venture out at all anymore. Even the kids do not play outside. Last I saw of them was kid two weeks ago telling me out of the blue his mum and dad were sleeping apart (not surprising), his mum shutting him up immediately. Since then hardly a sign of life anymore, bar slamming of doors or banging of stairs a few minutes every other day. And yesterday one snarky remark of neighbour to his wife.
These were neighbours who were almost always outside, with one very noisy and attention seeking seven year old. This is weird. Way more silent, but weird. Especially the kids this muted is almost scary.