The only real problem I see is, everytime there's a fork, I have to move my damn cold storage to access the coins.
Absolutely untrue, you don't have to move anything.
The Bitcoin Core will not support the new coins, but a resonable expectation from Super Bitcoin devs is that they will provide their own fork of the Core software too.
That's not a "resonable" expectation at all since you apparently don't understand the bitcoin software. There is not some magical "Bitcoin XYZ software" and then "Bitcoin XYZ wallet software", there is only one single Bitcoin XYZ software including all the functionalities. Any fork of the original Bitcoin Core software naturally includes the wallet gui.
If they do, and when they do, all you need to do is copy your wallet.dat (it cointains your private keys) to that new software folder and redownload the new blockchain. It should give you access to your super bitcoins.
Of course you don't have to redownload the "new" blockchain because from the very first block all the way to the fork block the blockchain is identical, as long as the block db structure wasn't changed by the fork developers (as happened with BTG). That's what the forking means - sharing the same history data.
Even if the developers did change the db structures you still don't have to download anything, you can simply connect the new software to the original one and pull the data via localhost.
How long this situation will continue?
Bitcoin Cash, Bitcoin Gold, Bitcoin Diamond, now Super Bitcoin. What will be next?
Bitcoin Diamond is not a fork, it's an altcoin. It doesn't share a common pre-fork blockchain history with the original Bitcoin, they mine blocks from the beginning.