Faffing with zips, mud in the zip, deflating ... would this really be faster at home than just swapping a beaded tyre? (no) Would you ride to work regularly on these tyres with a spare set of ice tyres "just in case" (again, no, I can barely be bothered to carry waterproofs in winter).
Also, I'm with team skeptical as to whether the zip will work when faced with real world conditions.
I don't think that's the problem these are going to be particularly useful to solve. A second bike, spare set of wheels, or simply riding on studs for a couple of months a year would seem like a more reasonable approach for that sort of thing.
Where I can see that they might be useful is if you're doing a tour or endurance event where you *might* need studs for part of the ride, but don't want to commit to them for the rest. A bit like using overshoes to keep your feet dry rather than the generally superior options of sandals or winter boots - they're a compromise, but sometimes a useful one. The longevity of the mounting system is less of a concern in those circumstances, but could still let them down badly (a bit like overshoes).
For that sort of scenario you want the tyre to be decent in non-studs mode, whether that be in terms of rolling resistance, puncture resistance, grip or whatever.