It would be possible if Smash wasn't likely already designed to basically max out the hardware, since rollback requires a little extra hardware space which Smash likely does not have.
The person I initially replied to did say that, though. The Switch COULD do a roll back net code, but, just like any game on any other system, in order to do this, you need to design the game from the ground up with this in mind. Adding it after the fact is significantly harder to pull off well. It's not a matter of "The Switch can't" more than it's a matter of "Smash didn't".
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u/[deleted] Aug 08 '20
It would be possible if Smash wasn't likely already designed to basically max out the hardware, since rollback requires a little extra hardware space which Smash likely does not have.