Why? As they would like to force you to login with GitHub, Google, Twitter or Reddit account.
I will wait for the next year, maybe 2024 Advent of Code will be less intrusive.
If not... I can live without it.
A hint to the authors for simple load/save, far simpler than what you have now, without use of intrusive 3rd party providers: use Digest::SHA qw(hmac_sha256_hex); $digest=hmac_sha256_hex("levelX:true,...", $key);
(And no, I wont workaround them. This is why we got into such situation - as we were still using intrusive services instead boycotting them, it is matter of principle not of technical workaround)