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The obvious solution to widespread ALPRs being, of course, 15-minute walkable cities... ;-)

Nah, analysis of gait is pretty bad too. At this point your best bet is a country with a patchwork of incompatible systems.

What exactly is the purpose of having space-within a patchwork of incompatible systems?

Because if you can't escape the surveillance in general, it's the next best thing.