I think they're trying to cover all the promised firmware versions, 7.x - 9.2, and that's why it takes so long.If they concentrated on 9.0-9.2, we would have been playing games already.
My thoughts exactly.
I think they have hard time to fix a bug free emuNAND for 3ds with firmware 9.0-9.2 ONLY. Any lower firmware should be less than 1 hour work if 9.0-9.2 works. Coding wise for below 9.0 should be more or less of copy paste of code for 9.0-9.2.