The thing I miss the most while WFH is the whiteboard conversations. It's nice to be able to drag your colleagues for quick tech discussion and go back to work. Pen is much faster than drawing diagrams online.
friendly suggestion, when sharing the URL it's helpful for the reader if you stylize it like the site does (collabUML). Otherwise it's hard not to see a misspelling of "collab album".
I often laugh when looking at companies solving the problems for working remotely, while you look into their job openings to see none allows working remotely, in this case, 7 out of 13 positions aren't remote, not bad but still surprised.