IGT is a realiable timing method that balances out the load differences from Digital and Cart. We already have a calculator for IGT. We can still have RTA times on the boards, but the rankings will be based off of IGT.
It is not the main method for this category because not everyone would want to submit with IGT as it does take a little bit of time to calculate. This is a new game so we decided to be as speedrunner friendly as possible and made sure IGT did not matter so much for Classic, unless there is a tie with RTA, then we manually add in IGT to break the tie. I think it should stay this way, mods would have to manually calculate and check every single round for every single submission, and we get numerous submissions daily. I don't think any of us are willing to do such a thing and considering its been like this since the game's release, I and the other mods would prefer not to go back to every single Classic submission there has ever been and add in IGT, leaving the old times with no IGT would not make sense in this case.
If the game calculated your total IGT and displayed it on the results screen, would we change the timing method for the boards?
If it did the same as Smash 4, maybe, and if there is to be a future update that adds it, probably not. Manually going through 1700+ runs (Probably closer to 1650+ since some already have IGT) to calculate IGT is just too much, we did not plan to make Classic mode IGT only for reasons above. There's no reason not to get IGT for all existing Classic runs if we decide to remove RTA completely from Classic.
