I cling to using Chrome's support for shortcuts-as-apps: go to whateverteam.slack.com, hamburger menu -> "More tools" -> "Create shortcut..." -> "[X] open as w

I cling to using Chrome's support for shortcuts-as-apps: go to whateverteam.slack.com, hamburger menu -> "More tools" -> "Create shortcut..." -> "[X] open as window". At least on Mac, it creates a .app in "$HOME/Applications/Chrome Apps" that works like any other app: it shows up in the cmd-tab switcher, you can open it with spotlight, etc. The best part (and the part relevant to your comment) is that this just opens a Chrome window and you can open (cmd-N) as many windows into the same slack team as you want, and it behaves like you expect a Mac app to behave: cmd-tab goes between teams and cmd-backtick goes between windows of a single team. I gather that there are some Mac apps or extensions or something that let you gather windows of _any_ app into tabs, so you could likely use one of those here to get tabs instead of windows. Supposedly Chrome is getting rid of support for Chrome Apps, I think that's what these things are called (?). If so, I'm going to be impacted when it finally goes away.