we use Teams and it's fine.

Just don't use the "Team" feature of it to chat. Use chat groups and 1-to-1 of course. We use "Team" channels only for bots: CI results, alerts, things like that.

Meetings are also chat groups. We use the daily meeting as the dev-team chat itself so it's all there. Use Loops to track important tasks during the day.

I'm curious what's missing/broken in Teams that you would rather not have chat at all?