That question as a whole doesn't really make sense since you can use a9lh to still boot to emuNAND, "just" to increase boot rate and speed and get recovery options before sysNAND booting.
Like I said emunand is NOT a hack/entry point. A hack/entry point is a9lh, menuhax, browserhax, any of the game based hacks, and mset. All of which besides a9lh require emunand, With a9lh you can use the sysnand.