The description in the ticket isn't too bad:
allows users to make a window disappear and keep only its title bar visible.
It really just hides the window contents. In effect, it is similar to minimizing a window, except that it doesn't spring into your panel and rather stays in place as just the window title bar without the contents.
It is a niche feature, if you couldn't tell. But it isn't some KDE specialty feature; various other desktops and window managers also support it. I think, it was more popular in the early days of graphical user interfaces, when we were still working out, how we want to do panels and such.
And conversely, I do think it makes more sense as a feature on big screens like you can have today, where your panel might be quite a bit away.Don't think, window shading will make a big comeback just yet, but yeah, probably enough existing users that use it, so that it would be cool to support that workflow.
Man, at $DAYJOB, if we open-source something, they tell us to check for checked-in passwords and whatnot, and force us to throw away the commit history, which always feels stupid when we've known upfront that we're going to open-source it and so kept things clean from the start.
But then, yeah, you see a post like that and just think that it really wouldn't have been too difficult to search for swear words before publishing.I mean, I also don't really care, since it's code rather than an official communication channel, but I can understand why management might care.