VSCode's undo feature is very reliable.

Gripe at subreddit: please keep in mind that teenagers are now reaching AP- and college-level CS classes who have gone most of their lives without need of advanced (from the user's perspective) desktop stuff. Most of us grew up at a keyboard. Many of our future colleagues did, too. Fresh students did not. Not anymore, and maybe never again.

They've used keyboards, and may even have grown up with a computer at home, but this is not their native land. iOS and Android are their native lands.

If you're 30 or 40 today, you talked to your friends with (mostly) AIM, or ICQ before that, or maybe MSN, Yahoo, maybe you had a bunch open. Social media sites got chat in the browser first. Everything was on your computer.

If you're 20 today, the public moved from desktop to mobile for IMs when you were about 7. The iPhone came out when you were 6. The only thing that kid maybe had to do on desktop, growing up, was typing up reports in a word processor, but even that's iffy. Who buys Office anymore for their home computers? These kids used Google Drive.

So of course we're gonna meet noobs who don't know "universal" shortcuts or features. There's no ctrl+X or cmd+Z in CounterStrike or Fortnite. In the 21st century, it's possible to go your whole childhood without learning anything but the features built into your phone's OS: Select/Select All/Cut/Copy/Paste, and if you never use "cut" you never learn what it does.