The thing is Electrum doesn't work that well unless you run it on an offline computer right? Does the general public setup separate offline rigs and want to deal with USB transfers? I doubt it.
Depends on what you mean for work well, if you want to use it as a wallet it works best with an internet connection. If you want to use it to implement cold storage, you could write down/memorize your passphrase, export your master public key, delete (ideally wipe securely) your wallet file, re-import the master public key, so you'll still be able to see your balance and get new receiving address but can't spend anywhere until you use your passphrase. You don't need an offline computer unless you're paranoid about it.