Most IRC clients allow you to quickly switch to frequently viewed channels via shortcuts (even irssi, a terminal client, does that). With Slack it is a clunky Ctrl-K and a first few letters of the channel name that may or may not lead to what you really want.
Yep, must say I miss the Escape-sequences for changing channels. Works fine via wee-slack though but unfortunately you need permission to join via wee-slack since it requires an API-key.
?? Slack has shortcuts for both of these. Cmd+0,1,2,3 to switch between orgs, opt+up/down to switch between channels. And also, as you mentioned, cmd+k for search-switching
I know Slack does support shortcuts, but search-switching is inferior to a direct shortcut. Let's say that you frequently use channels a and b in the org A and a channel c in the org B (this mode of operation is common). How do you get to a, b or c without even looking at the screen?