> I disagree. Try loading up a library heavy site (i.e. React plus a half dozen associated helpers for state, UI and whatever, which is pretty common) on an old

> I disagree. Try loading up a library heavy site (i.e. React plus a half dozen associated helpers for state, UI and whatever, which is pretty common) on an old or cheap Android device. It can take multiple seconds before the page is fully loaded. Even once the libraries are loaded, React sites often involve parsing a giant lump of JSON before you can do anything, that’s particularly CPU intensive and takes time on low end devices. Try doing it on a flagship handset like a Pixel 8 Pro, and it's still a slow and miserable experience. m.facebook.com, as an example.