1) links, easily workable solutions to this - including your own just dont have them. 2) speed - it can be done without becoming sluggish, please dont hold the

1) links, easily workable solutions to this - including your own just dont have them. 2) speed - it can be done without becoming sluggish, please dont hold the scrolling accountable for people who dont implement it correctly 3) tracking - aka bookmarking, if you cant use push state thats your problem, again please dont decree the scrolling broken because you dont know how to do it right. 4) impolite loading, it should happen automatically thats the whole point, it should happen before you see the end of the page but not as the page loads. All in all sounds like your claiming a good usability technique doesnt work plainly because you cant make it work.