KASLR isn't an effective mitigation against anything, and to me this is part of GrapheneOS's catalog of superficial but meaningless claims.

I've not seen someone refer to a portion of GrapheneOS's mitigations as superficial and meaningless before. What might an OS with significant improvements to usable attack surface reduction and exploit mitigations look like to you? What sort of things (given a team of less than a dozen contending with OS updates, upgrades and device support) would you have liked to see implemented?