Virtually all UPS new hires are going into F/O seats in big airplanes flying some of the most trying equipment (MD’s) into some of the world’s lousiest airports. Yes, Clark in the Philippines night/IMC/no radar in a big airplane is different that Akron in an RJ.

1930s...Pan Am Clippers, HNL to Shanghai
1940s...C-47s crossing the hump
1950s...DC-4s and 6s crossing the Pacific
2000s..MD-11s with dual IRS's, GNS, dual VHF/HF, CPDLC and ADS, dual autopilots and autothrottles, an augmented crew with a sleep facility (for us just sometimes).........and this is a challenge? I'd say it's fair to say there are the bones of some old pilots spinning in the grave over that. On the other hand, they all might be at happy hour in heaven laughing their asses off.