I take it that by "everything" you, like a lot of Windows-using prognosticators, mean "Windows".

Nope. It's the worst on Windows, but it's bad everywhere (except my iPhone).

Linux package managers are pretty good, but if you try to get other software things get weird. Installing Dropbox on Ubuntu is surprisingly bad. You have to click through all these info screens and then have it download the proprietary daemon part. That's one of the reasons we made http://ninite.com/linux

I use a Mac, and we're working on a version for those too. The whole drag from a disk image to the applications folder is really confusing for a large number of users. And anything that makes you click through a .pkg installer is a pain too.

The iPhone isn't perfect, either, though. It spits you back out on to the homescreen, which is quite aggravating if you had wanted to install something else. At least with multitasking it no longer loses your spot in the App Store app /too/.