> As a single developer it is impossible to implement a browser that is compatible with today's websites.
Then don't make it "compatible with today's websites".
In fact, that should probably be the goal. That is, what should or could "tomorrow's internet" look like?
Think of the "time lag" between "The Mother of All Demos" and it's actual commercial realization: Arguably the Mac, but some might say the Apple Lisa, other's Xerox Star, and still others could pop their own in the timeline - but for the general consumer - that is "wide adoption" - it was the Mac in 1984.
That's a lag of almost 15 years - but one guy managed to see that future, and with some help, pulled it into the past (if you've never watched the demo, and put yourself in the shoes of that time, then you can't easily understand just what it took for it to occur; it's honestly awe-inspiring to me from a historical standpoint, I'm sure there were people in the audience who didn't understand they were seeing the future).
Try to do that, is what I'd propose.
And some people are. Where I believe that future lives is in the idea of the "distributed web" - which honestly is what the internet should have been all along, but apparently we're going to have to drag it back there. Part of the reason it didn't go that route was mainly because of "dial-up access" - the end nodes weren't looked at as "peers", when they should have been, just instead of "always-on" peers, as "ephemeral and temporary" peers. But they were kinda sold differently, and most people weren't made aware that they could be (and should be) peers. But rather, relegated to 2nd class "clients" and "consumers".
Now many people have the available bandwidth to be closer to real peers, run servers, etc - but are instead limited in a variety of ways (most notably by draconian TOS language, that while in many cases is "ignored" - it can be easily dragged out to deny service if and when an ISP feels like it).
I'm not sure the distributed web is the full answer (the full answer would include mesh networks - but there are logistical issues there with those, especially in the United States, that currently prevent them from transitioning beyond, at maximum, "city level") - but it's a start, I think.