The reactions here are why people don't join forums, don't ask questions, or choose to learn alone. "duh, I knew that". Yes, the dude didn't, which is exactly why he's frustrated. I think too many have forgotten what it's like to be a beginner and make a fatal mistake, which would explain the mocking responses here and things like recommending new linux users Arch.
I understand the impulse to be empathetic and kind. But it's very hard to respond in good faith to someone who just made a post where more than half the words are "fuck you".
It had a reasonably clear warning, though; a screenshot is included in this response from the devs. But note that the response also links to another issue where some bikeshedding on the warning occurred and the warning was ultimately improved.
When you sell hammers you'll likely have people using them to hit their own heads, which, understandably, they will put the hammer at fault. Now, we already put a big don't hit this on your own head label on our hammer. Should we actually prohibit people from head hitting with our hammers? Probably not, since some users still want to hit heads with it. It's just how hammers work.
I disagree that that warning is reasonably clear. Even the comment that included it has the line of thought, where the user, not knowing what terms git uses thinks that they just did an action that is going to change each of their files. It makes sense that they'd want to discard those changes. That user then goes on with some snark about not wanting to learn any more about what they are playing with and that other programs would do the same, but "discard changes" seems like it would have a clear meaning to someone who doesn't know git.
The warning says it isn't undoable but also doesn't clarify that the files themselves are the changes. Should probably have a special case for if someone hits discard changes on a brand new repository with no files ever checked in and hits discard on a large number of files instead of checking them in. Even a "(This deletes all of the local files!)" would make it clear enough to say what the warning is really about.
There is a difference between someone who is new and experiences something like their IDE deletes a file that was unexpected and asking a question about why it did that.
Then there are arrogant assholes who believe their shit doesn't stink and that they couldn't have done anything wrong and it was the IDE's fault for not knowing what they wanted to do versus what they commanded it to do.
I mean, not entirely, and he says he lost months worth of work. Like imagine you know nothing of git:
Click buttons in the IDE to add source control.
IDE says a bunch of files have been changed.
But I don't want to make changes to the files, I want to source control them.
Attempt to undo the changes. Click "discard changes" thinking it will put them back to how they were before clicking add source control. Get a warning dialog that this is not undoable, but that's fine because I don't want whatever changes it made to my files anyway.
All files are deleted and unrecoverable.
Like that experience sucks balls and it's reasonable that a person wouldn't expect "discard" == "delete". Also, from reading the GitHub thread, apparently at that time VSCode was doing a git clean when you clicked this. Which like...yeah why the hell would it do that lol? I don't think I have ever used git clean in my entire career.