I wish I had the data! Likewise, collecting the number of passengers carried would be a nice cumulative statistic at the end of my career (I guess I can start recording this when I become a Captain?)

You could (probably) pull the ADSB data for a "representative" flight on given routes and use that to at least get close - probably would still be useful for things like radiation exposure mentioned elsewhere.

Otherwise, maybe you can get Claude to vibe code you a mobile app that runs in the background and collects all the interesting data (GPS, cabin alt, etc)

I’ll second this idea. Keeping track of your hours on high altitude is important sine you get more radiation than us on the ground. I’ve read various articles about pilots & flight attendants health affected by higher exposure to radiation.

True, but is it counterbalanced by their ageing at least a few microseconds more slowly thanks to spending so much time closer to the speed of light?

You actually age faster on an airplane, because you are in a less dense space and experience less gravitational redshift.

General relativity works against the Special Relativity in this case.

Well shucks to my high school physics teacher