Here there's Slack and Teams.
I like Slack because it has a modern, sleek, and efficient interface. I like how my direct messages and group chats are organized, and how I can organize the different Slack channels in to different categories with different notification levels. The interface is efficient and doesn't waste space. The dual plane view of a given Slack channel and then the expanded conversation after I engage with it is great. Less clicks more info. Searching works much better. I also like the reminder and save for later feature. I do not use Huddles or whatever but they work.
Teams is just like most other MS products at this point. Ugly, inefficient interface with tons of wasted white space. Clunky ass controls and donesn't present enough information when engaging with it. Organization also sucks. Chats don't seem to have any way to categorize, and the 'Teams' chat is a complete waste of space and time when compared to a Slack channel. Office 365 integration doesn't do me much good when it all tries to go through Shatepoint or OneDrive. It should never ever take this long to open a PPT or Word doc when engaging through this unified infrastructure. Overall it's a completely, entirely, from top to bottom, inferior tool compared to Slack. The one thing I do like is Teams meeting chats and whatnot are saved but they're still dumped in to the uncategorized list of "Chat" which doesn't do me much good but it's better than nothing.
Oh yeah, I like how I can be in a Teams meeting but then Teams doesn't realize I'm in the Teams meeting.
Sharepoint: Holy shit. How can this be soo bad for soo long? Because all these things are tightly coupled the overall work flow is more annoying because you have to engage with SharePoint. Looks like it's straight out of the late 90's, incredibly slow, mind boggling URLs, horrible organization. Complete and utter piece of shit compared to Confluence. Collaboration with live docs is...OK...but still when engaging with it at anything other than the surface level is infuriatingly slow and clunky.
OneDrive: Seems to be OK for backing up folders but a complete pain in the ass to engage with outside of that. Super slow, clunky, ugly, and hard to tell what the fuck is actually happening on the back end when deeply engaging with it. It should never ever take that long to download a 20MB PPT.