It's a good point, and I mean no disrespect to web coders. I forget exactly what the design was before the site was renamed to NWR, but I do know I liked that new design better than the previous, so in my case it isn't that I don't want websites to change. I have no idea how difficult it would be to allow customization, and maybe that's why the Internet hasn't reached that point yet. But it's clear that different people like things a certain way, so customizable layouts would please everyone.
YouTube seems to be a case of changing for the sake of change, they've gone through several redesigns over the past couple years. I've like a couple things they added, but mostly the layouts have gotten worse. GameSpot has also undergone many changes, though I've stopped visiting the site a while ago.