For years now I have traveled almost exclusively on military aircraft. The downside to this is, of course, flexibility. If you have a job with a leash then it's a difficult way to travel but if you're truly retired or have a job where you can digitally clock-in, then Space A is amazing.
I'll take stretching out on the floor of a C-17 and taking a nap or the sweet top deck of a C-5 over first class on Delta any day of the week and twice on Sunday. The pax terminal may not have the little buffet of an airport lounge, but I don't have to get groped, filmed nude, and have my rights violated by TSA thugs in order to enter.
And living in the PNW with McChord AFB stocked full of sexy C-17s ready to go anywhere, anytime... it's just so convenient.
It's also nice not having doors fall off the jet in flight.
If you're thinking about whether to stay until retirement or not, don't underestimate this benefit in your calculation.