This was the case before AI tho, people were copying coding patterns from companies randomly even without understanding. I mean there was an interview with some DoorDash architect that literally stated that whatever their architecture was just fad chasing at that moment.

Every company I've ever worked at (from ISPs to health insurance to finance) every organize was just copying the fad of something else.

At the time I felt like it was because that was "the best way" but it was more likely do to engineers not having the freedom to actually explore good solutions. The made up constraints imposed by organizations against their workers are rarely for the benefit of the company.

It's not a surprise to see this being the case, most companies on the planet are ran like centrally planned dictatorships with the results being obvious in retrospect.