I enjoy watching TikTok, especially local or niche creators who have just a couple hundred followers. This is not going to be a problem as you imagine.
> 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/