[Cthulhu_]

They really dropped the ball, going for a single page application approach without emphasizing performance.

I mean I believe SPA's can be more performant and snappy than non-SPA's, but you have to have server-side rendering for the initial page load and minimize the amount of JS used. And then make sure rendering is fast; iirc they had inline styling everywhere a while ago (styled components?), and now nonsensical css classes (which, if they're unique, is probably good for css performance but probably still suboptimal).