[zepolen]

I've worked with plenty of workers like this. They all got 10x work done in relation to everyone else, because no one else wanted to touch their stuff, they owned the branch and never made pull requests because it caused too many merge conflicts as they were sooooo fast at getting things implemented.

Their code was full of bugs which they fixed immediately, causing silent regressions. They never wrote tests.

The other 5 places they had copy pasted that buggy code still remained buggy.

Also whenever they spaghetti code themselves into a corner, they spent 10x longer refactoring stuff as a result.

In effect, it's not that they got 10x work done, it's that they make everyone else get 10x less done.