[tracker1]

There are positives and negatives to them all. I'm relatively partial to MS Teams (now that it works well in Linux), since it has decent integration with Outlook and group chat/meetings, integrations are on par.

That said slack and the like are better mostly because of integration which is smoother than custom IRC bots and clients by contrast... Some obsess over security, groups, etc... other features are just that features.

On the flip side, they all suck... MS Teams' wikis aren't in markdown and can't be edited outside of the teams client, other sharing is actually integrated into Sharepoint, and those integrations with system syncing breaks a lot and sucks worse.

I haven't used slack but very little for one project I'm on in a few years... it now has a lot of the features I was missing before. I think Google's Hangouts had a lot of potential before they shifted gears into their client of the month and started breaking the UX.

In the end, what will be around in 5+ years, who knows. Things shift around and change... Things get re-invented in better and worse ways.