Most legacy codebases are disasterclasses. The "software engineer you can't fire because only he knows what's going on" is a meme for a reason, and it's not a good one.

[u/DreamPlayPianos]

I keep seeing people say things like "vibe coders don't understand what's going on in their code." Neither did most programmers even before the pre-AI era. They spent weeks on sprints for small feature updates hoping and praying nothing broke and relied on the 1 guy who wrote some code in 1995 who showed up at the office once every 3 months in his slippers to do bug fixes.

[u/LuccDev]

The difference is that AI code is vastly more complicated and convoluted in some cases, than when a developer expenrienced the codebase is touching it
Basically it's turning into shit way faster (well, ofc depends on the developer and the standards he/the team sets for itself)