At my age - a prime 36 years old - the difficulty in traveling is the breaking of my daily routine at home. Like James Clear, I am big on habits and consistency. Traveling does make a stop to that stuff. Take for example: when I am away from home for long periods, I can’t take the usual supplements. Another example: I can’t workout when I’m traveling. Is the temporary pause detrimental? Probably not. But it just feels weird, you know?
What’s also weird is being in hotels. Most of them - expensive or otherwise - do not match up to my standards of cleanliness. Especially so for hotels in America. The western culture of not taking off your shoes indoors means accommodations here in the States have a higher baseline of dirtiness. You can vacuum that carpet all you want, housekeeping. Doesn’t change the fact that many shoes have walked over that surface.
Things are slightly better in Asia, with our culture of taking shoes off before entering an abode. Even then, the level of cleanliness scales linearly with the amount-per-night cost of the hotel (in my experience, anyways). The only experience that lived up to my admittedly high standards is the ryokan around the Mount Fuji area in Japan. That cost $250 a night in 2019 money. Read: that is expensive for me.
If I am to stay in an accommodation for at least a few days, what I do is clean the floors myself (when possible). That might sound insane to you, but the peace of mind is worth it. Plus, I get to enjoy actually clean floors. Can’t beat that!