Or they are a self motivated high achiever.

Didn't seem to make a difference here.

This is a case study of the futility of intra-corporate "high achieving" when you can be laid off on a whim regardless of performance.

Layoffs can be random, but promotions rarely are. It’s not necessarily a bad play.

Or they have fun coding.

I have fun coding. I can't get out of work fast enough. Partly to do my own coding.

I have fun coding. I can't wait to dig into interesting problems and figure them out - regardless of if it's for my own coding or my employers.

Ah yes, jumping to conclusions without letting the parent commenter reply. Genius.