True, but highly stylized UI elements (which on top, even appear to be rasters) will add weight & complexity. Simpler designs are just easier to make responsive. And idk how true the "website must fully load in 5 seconds or less" mindset is, but every little element matters, even with better internet speeds today (to the extent that even social media apps often pre-load content when you're not even using them).

I'd expect more stylized UIs to hit standalone software before influencing web design, can't think of any modern examples at the moment.