I thought Adventure wasn't allowed because of possible problems.
The game automatically takes care of all the known problems*, but
seeing how sloppy SA is, there could be some unknown differences.
I think Adventure probably should be allowed if there aren't any other problems.
Having 99+ lives would help, and no one would have to use AR.
(I'd rather not use it, because it really does give an advantage.)
I can just keep going with the 4 lives (many places have over 100 rings, so it's like unlimited lives),
but I don't want to if everyone else gets 99+/unlimited lives.
*Chaos 6 (Big) times aren't saved the first time because the timer starts late.
10 seconds are added to make up for the easiness of just grabbing the Emerald in some levels.
Is there anything else?