Because N64 is the standard and if we allowed emulator and VC for single star, they'd have to have their own leaderboard similar to the standard categories because lag and loading times would mean you'd have to use VC to get the fastest time. Single star is already niche enough, to have a separate leaderboard for emu and VC just isn't worth it.
I'm fine with the decision, but the reason seems arbitrary. Though the mods probably work hard enough as it is considering it's the most popular game so what do I know.
We would like to announce that VC and EMU subcategories are now active on the Stage RTA leaderboards (under "Levels"). Stage RTA involves collecting all the stars in a given stage including the 100 coin star. Timing starts on star select and ends upon collecting the final star. You are allowed to us