Ah, so when you said 'compressed air', you didn't mean
compressed air. Different industries.
...for a company to use insulation on their locks tells you there has been at least one occurrence where the method worked.
Super cooling metal to decrease its strength and plasticity is a well known phenomenon and I'm guessing lock companies knew about it without first having one of their locks defeated by that technique.
So, anybody got a video of smashing a frozen lock hanging mid-air off a bike rather than conveniently sitting on an anvil?