This thread is exhibiting a lot of stamina, so I'm guessing it will withstand a related-but-not-exactly-on-path question without risk of hijack.
All the talk of spending cuts makes me think of the Bernicke Reality Retirement option in FIRECalc, where the model assumes that spending just decreases by itself over time.
Aside from the deliberate reductions one might make in response to market-driven changes in the portfolio, what categories would you anticipate cutting as the years - and, with luck, decades - pass?
Travel would be perhaps the most obvious. I'm only pushing 60 and already dislike traveling. (DW loves it, so we've got many years of suffering on airplanes ahead of us.)
What else? Home and auto maintenance, maybe? Rich foods and liquors? Hobbies? Non-FDA-approved aphrodisiacs? Others?
Note to mods: if you see this as off-topic, don't hesitate for a moment to bump it to a new thread.