Also if you add gait recognition, you can add as many masks and hoodies as you want, but you will not escape recognition.

Would wearing some kind of full length cloak or burqa-sequence garment that obscures a lot of movement be a plausible counter? Obviously they can’t obscure everything about your gait, but I imagine they’d take away enough useful information to make it significantly harder.

Probably, but at that point you'd stand out to humans! Imagine being at an airport...

Standing out to humans is plausibly less of am issue than being monitored and recorded and your data stored in perpetuity.

Humans will forget about you, data recorded about you will be stored an reused and abused for who knows how long.

Good point. I was thinking that in a case of an oppressive gov you wouldn't be able to wear these things anyway.

For now, but if everyone was wearing one it could work.