My work uses Slack. I'm a software developer. Slack stinks of bugs and lack of professionalism. They change UI and features without concern for existing user productivity, deprecate OS and browser versions on a whim, etc. 1. You can no longer delete zoom call msgs. 2. On Android replies to a thread AND channel is now a multi step process. 3. On Linux it insists opening its own browser process and reopen all my default tabs with it. Etc. Not enough room here to list all the faults.