Even the few people who complained that they wouldn't use it because there wasn't a phone number to call for telecons were overcome when we told them to just install the app and join the conference that way.
For internal work, it's actually been a lifesaver. Webex and other solutions have failed to hold up under the strain while Teams has more or less just kept marching on.
I have a feeling as this goes on for the next few months Teams users will not go back to the fractured fragile mess of other apps we tried to get along with before hand.
Hell, there's even a halfway decent Kanban built in.
For me Teams has been a major downgrade from Slack
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.
Teams is somewhat good, good tools to create wikis and integrate third party solution like Jira and office integration. One selling point to me is that "it just works" even with non technical users.
Teams has video conferencing, but also hooks into SharePoint for shared documents.
They bought ScreenHero and tried to integrate it. They screwed it up so bad that the ScreenHero founder quit after 4 years and has gone and rewrote it and called it Screen: https://news.ycombinator.com/item?id=22676040
Teams does it all OKish, although the channel based messaging is probably the worst part.
It's sort of wrong to look at Teams as a Slack replacement. Well, it is for who just want chat, and don't care about channel messaging.
It's pretty easy for Teams too.
I don't particularly like Teams, nor do I like Slack, but there is nothing feature-wise, today, that would make me choose Slack over Teams. Teams also plays much better with OneDrive and Outlook, obviously.
I think Slack is now a goner. They will be acquired in 5 years tops.