In the US, the rate of passport holding is pretty low.. life can return to “normal” here without a lot of international travel. Those who travel internationally may be a different subset when it comes to “back to normal”.

Edit: “According to Census and State Department data, 21.4 million passports were issued in 2016, which is the most ever. That means 42 percent of Americans hold a passport, a growth of 15 percent since 2007. In 1990, only four percent of Americans had one.”