Bought 11.5/6 and ran the Nexus 7 demo from Favorites - popup says there's a newer WHDLoad (18.7.xxx); shouldn't AmiKit Updates take care of this or do I need to do it myself? Or is there another reason we're sticking with 18.6.xxx?

Hello!

Like the changelog says, the update was in preparation and testing period for a relatively long time. Meanwhile, some Amiga programs might have received even newer versions than those included in this build. However, the following AmiKit live updates will catch up very quickly. Or you can update particular programs manually meanwhile.

You mean 11.7? Hope you're safe and well!!

Yes, we're safe and far from the conflict. Thank you!
Raspberry Pi edition is the one with the most fresh software. It's currently 11.7.1. I'd like to catch up with the Windows/Mac/Linux version ASAP.

Appears you got to this at some point!