I like this familly of technologies. Having an SPA-type app that's mostly backend.
Recently i've redone my app website (https://alt-tab.app), and I implemented a minimal spa.js that has a similar approach. I find the end result blazing fast, simple to maintain / reason about, few moving pieces. I used Early Hints, compressed every single thing, inlined CSS, etc. I don't know how i could even make it faster.
I recommend this approach for websites that are not very complex. Of course if i made a browser-based music player with a super dynamic UI, that would have been a different story~
Oh, the alt tab developer! I actually love your product.
Very cool concept with AltTab. Have always been looking for something like it!
Can't the website be literally static HTML for 99% of it? I don't really see any user defined input that would change the output.
It's really fast, and seems fine, but is it just static pages? If not, why not. That's the question most front end devs don't ask themselves enough.