No matter. I transcribed that list in a matter of 5 minutes with no knowledge about the application (I haven't used slack in a long time). I'm not going to get it right in 5 minutes. It will obviously take time.

But, this is not the kind of thing that justifies, for example, having 20 engineers to work on this one problem for three weeks.

It's still a simple thing for one person to handle in a couple of days.

I don't get why people use feature lists as an excuse for why things take a long time and require many many engineers.