GPG signature renewal vs new key

Hello, When looking at the archlinux gpg keyring, I notice that when GPG keys expire, TU's regenerate a new key instead of renewing it. Why do they regenerate a new key instead of renewing, is it the same reason we put expire dates on our TLS certificates (for security). Is it bad to just renew your key without regenerating it? Thanks, -- Polarian GPG signature: 0770E5312238C760 Website: https://polarian.dev JID/XMPP: polarian@polarian.dev