[sfn42]

Highly agree. I've done quite a few large refactors of unnecessarily complex systems that resulted in significant improvement - from lots of bugs to nearly no bugs, incomprehensible code to simple straight forward code, no tests to great test coverage.

I did have one bad experience where I ended up spending way too much time on a project like that, I think I made some mistakes with that one and got in a bit too deep. Luckily my team was very supportive and I was able to finish it and it's a lot better now than it was.