If allowed to reach their absolute limits of potential and strength who would be the strongest and if not from here who would it be?
Personally I think people overrate Mahito's potential. I think he still could have gotten stronger, but people hype up the "1-2 years old" thing when that really doesn't mean a lot for a curse. Most curses don't have a developmental stage, outside of cursed wombs, so that doesn't really change much, infact having 1-2 years to train is much longer than people like yuji and arguably yuta have had.
Mahito was 8 months old when he died. Dude barely had any time. Mahito just has a very difficult ability to deal with, just like Infinity is difficult to deal with. Both have incredible potential.
During Shibuya Mahito really showed how quickly he was growing and it was no joke. We have never even seen curses dish out black flashes except for Sukuna… which says a lot.
Sukunas not a curse