That site is horrible. First it scrolls horizontally and then it switches to vertical towards the end. Why do "designers" have to reinvent simple things again and again? Is there nothing better to do?
Here is an example of horrible UX plus horrible loading time plus janky scrolling brought you by Google. 60 seconds after the page was open the content of the top of the page was still not done loading (72MB before I closed the page).
https://store.google.com/us/product/pixel_3
I think it's hardly just a matter of design here.
It's kind of crazy to me that even that's considered low
Way more impressive, though, was Opera 9 at 5 MB, which, unlike Firefox, also had a built-in email client, IRC client, download manager, BitTorrent client, ad blocker, debugger (Firebug was an extension at the time), sync, and several other impressive features.
If you carefully read my message, nowhere I'm saying 14MB (not mb) is "low".