Best practices for obtaining a new GPG certificate

[Robert J. Hansen]

> The next default is ECC (ed25519+cv25519) which is supported by most
> OpenPGP implementations.  Only if you have a need to communicate with
> some niche implementaions you need to use rsa3072.

Last I checked, Thunderbird 78 did not support ed25519+cv25519 keys. 
That's not a niche implementation.