> When passing an entire design specification into an LLM and receiving a new representation token by token, generating a response would take several minutes, making it impractical.

Woe is me, it takes minutes to go from user-designed mockup to real, high-quality code? Unacceptable, I tell you!

But seriously, if there are speed improvements that you can make and are on the multiple-orders-of-magnitude then I do get it, those improvements are game-changing. But also, I think we're racing too quickly with expectations here; where minutes is unacceptable now when it used to take a human days? I mean, minutes is still pretty good! IMO.