Unread teams groups are bold and same with chats that have new messages.
Calls likewise get a dot and so on.
Show me a training plan (outline is fine), case study or blog or anything outlining how to train my 50 non-technical coworkers in the use of IRC. They need image support and audio chat and all the other modern chat features users demand. Keep in mind there are a lot of chat options and users will walk if what you want to use is rejected by them.
IRC is not and has not been a even remotely viable option for anyone but nerds and hobbyists for many years now. i would be very happy to see any evidence to the contrary.
I get all the activity I should be alerted to in my alerts button too so document conversation, hidden teams, etc all show up there too.
For me Teams has been a major downgrade from Slack