I couldn't disagree more with this post. Teams offers such a better solution than Slack for virtually everything, in my opinion. Slack's voice/video chat is a toy, and it's unbelievably slow and unreliable. I am so glad I don't work for a company that uses Slack anymore.
It's very interesting how different people's experiences are. I worked for a company that used both Slack and Teams, and Teams always caused issues, was unstable, and had many video problems. Slack worked much more reliably for us. Perhaps it's a platform issue? Nobody in our workplace used Windows, everyone was either Linux or OSX.
I've found teams > slack for video and stability on OSX, but slack has a better UI. Both have been mostly unusable for me on linux though I think it may also be machine dependent (I had an XPS13). I've never tried them with windows
The biggest problem with Teams is everything outside of chat/video that it tries to do.
Did you know Teams had apps? Inside of it?!
90% of the problems I encounter with Teams (bad UX, crashing, freezing, corrupted sessions) would be removed if they deleted every feature outside of chat/video and more loosely coupled themselves to Office365/Exchange.
I think the Linux thing is machine dependent. I used a Dell Latitude something-or-other (7490? idk) for about 3 years, but it was the version that shipped with Ubuntu. Rock solid on Slack, and Teams mostly just had company-wide issues for us. But my colleague with the same model laptop and same Ubuntu version had no end to trouble with both Slack and Teams - turns out, the Windows version of the laptop had different internals and it struggled mightily. It was mostly GPU issues. Just thought that was interesting, mine is probably not a useful anecdote.
But did you ever try to search for a message in a conversation, and have it give you just the message you wanted, without any surrounding context? Or have you ever tried to scroll through chat history, only for it to lazy-load 10 messages at a time, making you spend 5 minutes scrolling constantly to find a conversation from a few months ago?
Teams would even lose my messages completely from time to time. It was honestly hard to believe how janky it was.