Certain gTLDs have been borderline scams. The most infamous one might be .sucks, an extortion scheme charging an annual protection fee of $$$, complete with the pre-registration process when you could buy <yourtrademark>.sucks for $$$$ before it’s snatched up by your enemies.
They also screwed up some old URL/email parsers/sniffers hardcoding TLDs. Largely the fault of bad assumptions to begin with.
Other than the above, I don’t see much of a problem. Whatever problems people like to point out about gLTDs already existed with numerous sketchy ccTLDs, like .io. Guess what, the latest hotness .ai is also one of those.
They also screwed up some old URL/email parsers/sniffers hardcoding TLDs. Largely the fault of bad assumptions to begin with.
Other than the above, I don’t see much of a problem. Whatever problems people like to point out about gLTDs already existed with numerous sketchy ccTLDs, like .io. Guess what, the latest hotness .ai is also one of those.