I’d say it’s a break if the encryption you once used (512bit and below RSA) is now trivially decrypted thanks to mathematical advances.

RSA 2048 hasn’t been broken but 512bit RSA definitely had been by any definition.

I feel “RSA is fine because much longer key lengths still work” is hiding what happened here. Yes we can still get into the infeasible realm with RSA and really long keys but the algorithm has definitely let us down multiple times thanks to mathematical improvements in factorization that just keep coming.