Wow, I didn't realize about 25-50% of each new block height are ordinals inscriptions, no wonder why the network has been busiest than ever lately.
This is another difference between this attack and its predecessors. This time the spam transactions carry a clear sign of being a spam transaction whereas in previous spam attacks such as the last big one in 2017, it was very difficult to distinguish between a spam transaction and a regular transaction in a lot of cases (not all though).