AEZEED is the worst part about LND. It looks just like a BIP39 phrase. I hope that no-one is ever confused about this in such a way that they lose coins. It's yet another competing seed phrase standard that must be considered when backing up. LND should have just used the common BIP39 format while leaving the duty of metadata backup to the user.

Lets say someone finds an old seed backup and they aren't sure what it's for. They might try to load it into a normal wallet and become confused at why it doesn't work to restore funds. Let's say they figure, "Well, maybe this is an LND seed." Now they are forced to go grab LND if they don't still use it just so they can restore the seed. Hopefully, at that point, LND hadn't decided to switch to some future seed format forcing the user to track down an old version of LND just to restore.

In a sort of "pit of success" model, these phrases should have just been BIP39 with a corresponding config file. This is similar to the need for a multisig config file. Even if that config is lost, a sufficiently technical user could still determine the spending routes while not having to consider alternative seed format. Having to remember that it's not BIP39 is just weird, and non-technical people will not understand.