I wonder what the "vast majority" is that you mention. For me, with JS off by default, the majority of sites I come across when searching for things are perfectly readable without JS.

The sites that need it are a small whitelist of ones I trust (e.g. the banks a sibling comment mentioned), which I enable.

...That said, a 75MHz RISC-V will be approximately comparable in performance to a 100MHz 486DX4, or a 40MHz Pentium.

Then don't use shit websites that require javascript.

... like my banks?

I actually like/need to use websites that use javascript, imagine that