In 2022, those who went back on Sunday had to endure sitting there for FOUR hours with a track grade every TWO races. The big pay-off of the semi-finals and final were called off, because the track had supposedly suddenly deteriorated, when in truth it had been awful since around Heat 12 of the previous day. So the most three important races weren't ON that day, whatever you may choose to claim. Rose-tinted specs, perhaps?
I did go to the subsequent two Cardiffs, but many didn't bother. The racing at Cardiff varied between poor and awful - I think that's why the majority stopping going.