The reason they don't allow flash is because it's so unstable. Flash is fuc
king up my computer right now actually!

And the reason they aren't customizable is all because of design. The more options there are, the higher the chance is of something going wrong. It's also pretty pointless. Back in the day I used to think the same way. I hated that Facebook wasn't customizable, and that Myspace was. I can't change my background? I can't edit my profile? This is s
hit! You could do anything you wanted on Myspace! But once I learned more and more about design, I realized why. Apple's design is unbelievable. Their stores, their products, their packaging, their advertising, etc. I think that's why I like them so much! It's the designer in me.