I think not wearing masks again will be easy to normalise. For example, Hong Kong got hit by the first SARS and everyone wore a mask for a time, and then when it was over all was back to normal and masks quickly became rare.
Larger countries (including the US) that are more sparsely populated and tend to rely on central messaging from authorities less will probably have areas that are slower at adopting new measures (or lack thereof), which may be frustrating, but I imagine large cities will be able to react promptly.
The societal norm/expectation that we wear clothing in public is no big deal. Why can’t we have a similar mask-wearing norm? I don’t see many anti-clothers protesting city hall over their right to go naked.
Hopefully that’s not how things work, or the effect has no practical significance.
Second best option, we’ll find a way to compensate for that.
Else, maybe we shouldn’t normalise masks to such a degree except for periods when it’s necessary.
Another side-effect is that masks should be replaced regularly, so everyone wearing masks at all times would mean a lot of waste (hopefully bio-degradable).