[lemonish97]

Honestly prefer teams over slack. Slack is good at text threads, while I'd still choose Teams for calls and meetings.

[OJFord]

That's fair, in my last org we used Teams for meetings despite Slack for general chat etc.

Partly I'd say that's due to MS giving it subpar experience in O365 calendar/mail/outlook - you can't join a call directly, best you can really do is link to the channel as location.