Don't waste your time ;-; you wont get him convinced. His logic is that if it cant unbrick everything then its not worth it.
Just wait for a good hack needs the A9LH or something, then you will see him joining the A9LH Master Race :3
TBH, Menuhax is way worse than A9LH. What would happen if you accidentally update sysNAND? What would happen if the new update comes out, you update but then can't boot cause of the Gateway file being outdated? With A9LH you can reflash your sysNAND without the risk of losing the hacks, or download a fixed hack that could be able to boot the new update. If something happens to sysNAND. What would you do huh?
A9LH helps a lot, more than just "unbricking" or "turns on a bit faster"
I'm not going to waste my time anymore, k thx