[csomar]

It's a bit more complicated than that. Modern web development done correctly can help: Pages are generated in the server, no JavaScript required. If you start with a PWA mentality, then your application/site is progressive and you should cover everyone; or almost.

However:

1- Progressive is expensive. You'll need more time as you need to sort what features can work; and work your way up to the full experience. The full experience, however, is what you are getting paid for (or showing). Unless the client or the company cares about these categories, you don't want to expend budget on that.

2- Web development is becoming complicated. You can get started quickly with Nextjs/Gatsby thanks to "DX"(Developer Experience). The reality is that you don't understand much of what's going on behind the surface and if you bootcamp-ed your way in 3 months, you probably have no idea what's going on. But it works!