The preorders haven’t started yet, which I guess they just implemented by setting the stock to 0. Preorders open at the 1st of May at 9:00AM PST according to the product page.

You can use environment.etc to manage a file in /etc: https://search.nixos.org/options?show=environment.etc.

I’ve had this happen when trying to use a password longer than 60 characters. I could set it just fine through registration or password reset, but I could not log in with it. Limiting the length of my password to 60 characters resolved the issue.

I keep my keys on a Yubikey. I’ve not really had a need to use the GPG portion of this on Android, but it works fine on Linux and MacOS.

I used this guide: https://github.com/drduh/YubiKey-Guide