Ummmmmmmmmmm.... I mean I don't know? I use it for romhacks and cheats. That's not to say I haven't played and use BootNTR (NTR-Cheat-Plugins) for cheats as well.
So idk. Up to you if you decide to keep using it or not.
And if you are using A9LH+Luma3DS, there really is no need to keep using an EmuNAND//RedNAND, because it actually complicates things when it comes to DSiWare and VC games. You'll end up having to install DSiWare onto both EmuNAND and SysNAND if you want to play them on EmuNAND, or have to boot into SysNAND and install your DSiWare//VC stuff there, and when done, boot into your EmuNAND and play your other games there.
BUUUUUUUUT, if you insist on keeping an EmuNAND//RedNAND for personal reasons, you'll need to setup EmuNAND9.
Link:
https://github.com/d0k3/EmuNAND9/releases
Just set it up under Luma3DS' payload chainloader, at whatever button you want. Then do the "Complete RedNAND Setup" - You'll need to unlink NANDs and all that jazz.