We hope you aren't too averse to the Mac App Store, because it's going to be the only way to upgrade your computer from now on. That's right—no more USB option, Pocket-Lint reports. Forever.
After a bit of hand-wringing and whining last time around, Apple reluctantly offered a disgustingly-overpriced thumb drive copy of Lion for those unprepared for the download-only route. Tough shit, Mountain Lions! Says Apple:
"It was an interesting test, but it turns out the App Store was just fine for getting the new OS."
You hear that? It's just fine. And if you don't live in an area with suitable internet access, you'll just have to go to your local public library like some sort of street urchin and beg for the Wi-Fi password. Then again, if you're out in the boonies without decent internet access, what do you need a top of the line laptop for anyway? Good riddance, disks and drives and things.
Caveat: this will be a potential horror nightmare should you ever need to reinstall or do emergency triage on your computer. [Pocket-Lint]