I think the term in this case is marketing.

NVIDIA used to use the term supercomputer more often five or six years ago. It's now fully committed to the term AI factory. I think this is supposed to make you think of their expensive kit as a productive asset building your business rather than an expensive tool for your boffins. Your average business executive is instinctively going to question whether they need a supercomputer but don't yet have the same preconceptions about AI factories.

I don't think that Nvidia single handedly caused the move away from the term supercomputer. But I think they had a hand helping push firmly in that direction.