The calculated DW cost of the quantum attack is 2^104 (with conservative/optimistic assumptions and ignoring the physical cost of a single logical gate), which is "much more realistic than a brute force attack" in the same sense that a 128-bit brute force attack is much more realistic than a 256-bit brute force attack.

None of those are remotely practical, even imagining quantum computers that become as fast (and small! and long-term coherent!) as classical computers.