A friend of mine at work only have Electrum as their wallet in their PC. He asked me what to do and I told him I will install Bitcoin core so he can export the private keys to whichever chain will be available after a possible split.
Why go to all that trouble? Electrum is a perfectly adequate place to have your coins in the event of a split. In fact, I'd say you can probably export your keys from Electrum easier than you can from Bitcoin Core.... Plus you don't need to download 120+gigs worth of blockchain data...The Electrum Dev, ThomasV, even wrote a guide to using Electrum with 2 chains (ie. How to split your coins): http://docs.electrum.org/en/latest/hardfork.html
