this might just be a case of post hoc ergo propter hoc. Linking the price of arb to this (or any) event might just make us look at all elements from the wrong point of view; and beside, the event we had in march (the huge unlock) is potentially more impactful on the price than anything.
Would take this occasion to link the study from chaos labs about increaasing arb base fee, worth reading. [Request for Support - Chaos Labs] Backtesting and Suggestions For Min Base Fee - #5 by chaoslabs