It was mostly panic. As in: it didn't apparently affect revenue in any way, but content creators always check view stats/graphs for their own videos to see how well each of them is doing. So sudden drop made YT the main suspect. It didn't help some changes to video visibility for "children" profiles was pushed at same time.

The interesting question is how/if this impacts the recommendation engine. If it does impact recommendations, then that will directly penalize channels with more adblock users.