> But really the ultimate goal for any good website engineer should be to offload as much logic and processing to the browser, not rewrite everything in JS just because you can
Why? This makes for a horrible user experience. Things like TicketMaster, and in recent years GitHub, slow my machine to a crawl sometimes. I much prefer mostly static content. This is a well-made website: https://www.compuserve.com/
Which isn't JavaScript's failure per se. I wouldn't wat to use a Google Maps like thing, with full page reload each time I scroll or zoom or check details of a place.
The issue is of "plain" websites for bad reasons add dynamic stuff.