It's quite simply that the list in 21.04 is larger because it needs to contain all our revoked binaries and that's why you run out of space. Due to the pandemic, we were unable to switch signing certificates and had to revoke all binaries via MokListX instead. Once the shard holders can travel again and we can revoke the old key and sign with a new one, we won't need the large MokListX again.
It's quite simply that the list in 21.04 is larger because it needs to contain all our revoked binaries and that's why you run out of space. Due to the pandemic, we were unable to switch signing certificates and had to revoke all binaries via MokListX instead. Once the shard holders can travel again and we can revoke the old key and sign with a new one, we won't need the large MokListX again.