According to TechFlow, on June 11, AO community manager JonnyRingo Williams responded to questions about whether $AO will replace $AR or whether it will migrate from Arweave to AO. He made it clear that there will be no "migration", @aoTheComputer exists on Arweave as a computing layer, but will not replace it. It acts like L2, Arweave is the L1 layer, but the purpose is different, $AO will be used for scalable computing, not cheaper transactions.