Comment by plaguuuuuu

Depends on what the existing project looks like ;-)

One repo at my work is DDD-esque, clean architecture, modular monolith.

It suuuucks to work on. Even without AI, editing any feature requires navigating through a bunch of app, infra, domain layers instead of living in a vertical feature slice. Indirection from cargo cult design patterns we don't need, like Mediator. With AI, degradation in quality and accuracy is plainly obvious. Everything needs hand-holding. AI is dumber than our average human dev so the creaky architecture made things 10x worse

The greenfield one we started with AI a few months ago is kicking along nicely. Warts exist, there are some really large files and questionable bits, but it's way easier to work on because we didn't make the architecture some convoluted dwemer mine thingy