[osdiab]

The impact of having a site work without JS depends on who your site targets - if your site is mostly focused on young US professionals in cities using Macbooks and iPhones, bandwidth and browser support is going to be good enough with or without JS; you might lose out on some market share from accessibility if your site is poorly accessible, but it’s unlikely to be make or break for your site.

If your site is supporting elderly people in developing nations on low-specced computers/phones, probably a website isn’t even the best vehicle for your product, but supporting no-JS might be more significant for accessibility and bandwidth reasons.

I suspect the vast majority of products people work on here would not gain much by working without JS, although some passionate and outspoken people make it seem otherwise.