Not really a problem with UDP itself, but with some very old protocols like DNS that rely on UDP but can’t be changed because of compatibility. If you’re writing a new service that uses UDP, there’s nothing stopping you from designing it so that it doesn’t provide an opportunity for bandwidth amplification.

The fact that most universities will graduate CS majors without ever teaching them how to use a debugger, build system, or version control system shows how useful they are to actual engineering work.

Science fiction spacecraft - Enterprise, Nostromo, Tardis, Falcon, etc.