quantum-safe crypto, no network upgrade needed
i don't think about quantum risk that much, but it's one of those things you'd rather have solved before it matters.
what i like about starknet's approach is that accounts are programmable, so new signatures can be added without upgrading the whole network. a bit like changing the lock without rebuilding the house.
the hard part is cost: it's already been cut almost in half, and now anyone can have a go at getting it lower, agents included