I love seeing new, exotic places (and trying new, exotic foods), but flying is such a chore these days. It's rare to be in a flight that's not completely full or even overbooked. Here in the USA, our rail network is abysmal so unless you want to drive for multiple days straight, you have to fly if you want to go further than a couple states away (or 5-6 if you live in the northeast / mid-atlantic region, where the states are a lot smaller in area). I have a good amount of experience flying, as Hawaii was one of my family's favorite vacation spots when I was younger. I've gone outside the USA a few times as well, my most recent trip being to Japan, which I just returned from the other day. In regard to OP's question, I wouldn't say it has become more popular in the USA, at least long-distance travel, as many Americans have this awful "America is the best country in the world so there's no reason to see what the peasants in the rest of the world are like" attitude. In some parts of the world, yes, traveling has become more popular. Ever noticed the herds of Chinese tourists at popular vacation spots? Nothing against them; I find their culture fascinating, their food amazing, speak a tiny bit of Mandarin, and have actually been to China; but they are not very good at the whole tourist thing.
_________________
When anti-vaxxers get in my face, I say ... Have a Nice Day!