I won’t miss iDisk (Dropbox always did it better¹), but I will miss the Keychain, Dock items, and Mail settings syncing.

I imagine it’s safe to say that they weren’t wildly popular, but they were extremely useful. Need to use another Mac for a while? Create an account, punch in your MobileMe user and pass, and voilà!, it’s almost your Mac.

You can quickly and painlessly install all your (App Store) apps using just a few clicks and sync your contacts, calendars, and photos, but the things that really make your Mac your Mac — the Dock items, the Mail settings and rules, and most importantly, your Keychain — are left stranded on your other machine. Removing this functionality during the transition to iCloud is a retrograde step in Apple’s “iCloud is the One True Platform” strategy — it removes a huge part ease of moving between machines in the way Apple seems to be trying to encourage.

And what grates the most? The fact that it feels like such an un-Apple-like change.