the computational cost of running a quantum computer with Grover exeeds conventional query PLUS you have to considere if the target is as valuable as an alternative target. Target Nr. 1 is clearly Nakamotos Adress, not because it is the biggest fish, but because it will not move. All other targets can simply change address. Why quantum resistence for Hive? It is not a crypto-currency, hackers could simply DDoS particular nodes of the "quorum"
Love to see the topic discussed, just asking