The current reliance of sites on Javascript is worse than Flash ever was. Flash elements can be blocked, but if you block javascript, this disables the entire site, so you have to live with CPU chugging mess of a website.
That is sort of my point though. On the other hand, I can see myself just stopping to use sites that abuse JavaScript, keeping the "good" ones. Maybe that kind of feedback just have happened on the web a long time ago.
