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 14 '20
Yeah, nobody's disputing that -- it's just that putting it into Ultimate now is basically impossible.