Certainly, in terms of accessibility, the JavaScript (and Browser) landscape has never been better than it is now. General awareness and tooling for building online experiences that consider disabled users has led to an infinitely better time for these people when using the internet, overall.
Sure, some people build shitty products that make your fan spin and ignore disabled users. But that's because they've built a shitty product, not because of the 'modern browser' itself.
> The web can be a resource hog, sometimes devouring CPU and memory. But it doesn’t need to be that way.
It also doesn't mean returning back to horse and cart!