Is There Any Benefit Keeping A 3DS On Low Firmware?

(Yes. I'm well aware of how the screen looks. I'm transferring the motherboard to another 3DS that has better screen that aren't water damaged.)

Is there any benefit to keeping this JP 3DS on V 6.2.0-10J? I thought it was rather interesting but I didn't know if it was a big deal or not to update it. I would like to install CFW after I fix the screen issues. I didn't know if there was any good recommendations for that either. Unless, it's no big deal updating my 3DS. Which I could do Luma then being on 11. I just don't know what to use being on a lower firmware. Or if it even matters.