Yeah I mean, microbial life existed on Earth since essentially the beginning, so it's my belief that the conditions of life are not unique to Earth; I absolutely believe there is some form of life elsewhere in the universe, or even in the solar system.
Intelligent life though? Idk, who knows what evolutionary pressure is required. All other biospheres could just be ocean germs.
"cli proficient" depends entirely on what you are doing, other than extremely basic stuff like learning how to use coreutils, really you just gotta try and use it whenever you can to get used to it.
The countries that travel the most are wealthy nations, and America is by far the most populated of them
Your link isn't loading for me, but does it account for factors such as Americans have drastically less vacation time than other Western nations and often traveling to other states instead of abroad? Most Americans don't even have a passport.
Seconding LibreTorrent, works great for all my mobile torrenting needs