Slack has been great for my company for about seven years now. There is a feeling that the development stalled a couple of years ago, probably due to Salesforce

Slack has been great for my company for about seven years now. There is a feeling that the development stalled a couple of years ago, probably due to Salesforce, Teams' market sweep and struggling to keep up with Discord's feature set, however, Slack still feels very polished for me -- a long time ago I've tried Mattermost and immediately noticed quite a lot of "paper cuts", tiny problems like wacky keyboard focus control that would be ignorable if I didn't know that Slack gets them right. Teams is a nightmare. Don't get me wrong: I like Teams just because it's not Office Communicator/Lync/Skype for Business anymore, i.e. I can actually chat with people, but it's abysmal in every other way. Just today, I tried copy&pasting a quote, so I typed in "> ", the quote box appeared, but I couldn't leave the box anymore (to add a comment to the quote). Moving around with keyboard, clicking with the mouse didn't help. I tried inserting a couple of empty lines before pasting and noticed that I can move down in the text with the down arrow key, but the up arrow key would switch me to the "edit previous message" mode. And this stuff is everywhere and I'm not even talking about elementary stuff like being unable to stay logged in into different workspaces in different browser tabs at the same time. I'm happy to be using Slack right now and it pains me immensely that their fate is basically set, since their enterprise market share has been mostly eaten by Teams, they are way behind by user count and it will get even worse with Google Chat on the rise (which probably sucks too, but haven't tried it).