I never heard of AltGr reffered to as “Meta”, except maybe in the sense of “Emacs modifier” which might be bound to it. Super is definitely the key between LCTL and LALT though

You can use Meta or Super as a more agnostic term

Not what you asked for, but you may be interested in getting a keyboard running QMK where you can define these kind of modifier overloading (and much much more) on the keyboard itself, so it’s “portable” and doesn’t require OS/DE settings

External drives are more prone to damage and failures, both because they’re more likely to be dropped/bumped/spilled on etc, and because of generally cheaper construction compared to internal drives. In the case of SSDs the difference might be negligible, but I suggest you at least make a copy on another “cold” external drive if the data is actually important

Indeed… IPv6 needs to be actively disabled, not enabled, by default.

Unless your ISP provides IPv6 connectivity, which gives every endpoint a globally-routable address. Firewalling at the router only works because of NAT.

I can’t change my router’s DNS

Do you mean you can’t change the DNS server in the DHCP settings or the server the router itself uses? In the first case you might be able to use Pi-Hole’s DHCP server instead, while for the latter it shouldn’t be an issue - I actually usually leave upstream servers configured there to avoid loops. BTW, you might also be able to flash OpenWRT to your router

Probably not worth trying to actually use today. I’d leave it as it is, imo it’s better as a small piece of history - Android on PC is pretty niche