It is for most people. But some of the more experienced modders also have had the chance to listen to STAX, and god bless them, Orpheus and baby Orpheus. So to them the stock sound is ****ty, but they could see the potential locked behind that undamped closed cup. And so far 4 people have managed to unlock that potential into 4 different great aspects: the Thunderpants, the community-shared DBV #3 from BMF, the somewhat commercial Mad Dogs, and the mindbogglingly (or so it is said) neutral Paradox.
Some already did. They have no illusion that it could ever match it, but they did say that it's probably some of the most cheapest to get a very great neutral sound. Although from what I gather, STAX is not all neutral all the way though. LFF, and few others said so, that they treat the Paradox as a 'palette cleanser' of sorts.