The only company where I was tasked with "maintaining and fixing" the code of others, parts of the codebase where 90s' blackboxes nobody would touch with a 10 ft stick, and simply setting up the proper environnement to reproduce a bug could take up to two days.

Then some weird error relating to some obscure fax sending module reconverted into an email templating service would creep up somehow and have to be fixed before I could go back to debugging.

So, yeah. I churned, and went on to build new things.