thing is, those old school private key paper "wallets" still work. exactly as they did 10 years ago, and will 10 years from now. nothing fancy.. just works
Yeah, just like riding a horse and driving first automobiles from 1900 still works and it's nothing fancy also

To be honest, I don't think this is a fair comparison.
While we're on the analogy of transportation, I'll add mine: paper wallets are like walking. It worked thousands of years ago, and it will work thousands of years from now. Even though there are risks involved, and even though there are much more modern and faster systems available, walking is the one thing that will always be around.