The camaraderies correlates with the length of the trip. I’m still friends with a man I sat next to one Christmas Eve
There is a threshold at which a person becomes so important or has such a fancy job that travel becomes a requirement rather than a lovely adventure. These people will be sure to tell you if this is the case; just as it’s apparently the law to disclose, unsolicited, whether one attended Oxbridge.
But even if I were one of those bankers who seems to commute from London to Singapore (seriously: just move to Singapore), I think I would still get a kick out of looking at dolphin-nosed planes waiting on the tarmac.