It will break down eventually. I've already noticed people doing whatever they like, standing and walking close to others, not wearing masks where they're supposed to. Honestly sometimes it seems like nothing is that different, except for seeing mask wearers, and even then it's inconsistent. You can't expect people to forever stick to rules that deep down they know make no sense, and as more people ignore them, others will give up trying to enforce them or telling people anything. People can only pretend to buy this for so long. These rules will be forgotten and no one will care.