Signal isn't a great option for general community group chat if you primarily use it for immediate (urgent) texting, though. It breaks down especially when you add global connections in different time zones.

We are a small group with a discord "server" - and that works for us because most of us doesn't use discord for anything else - and i can comfortably have only notifications for dm/mentions and otherwise read it async at my leisure.

Granted discord has a gazillion knobs to tune notifications - but i could never make it work reasonably for diverse use cases like "wake me up in the night if family tries to reach me" and "never nag me about game updates - that I'll strictly check manually".