I have seen data that suggests that people tend to spend a lot in the first five years of retirement and then as their "bucket list" becomes more fulfilled, they tend to spend fairly modestly until their much older ages when big health costs start to kick in.
In my case, after retiring at age 55, I had a few years when I spent big on what I would call the things that a boy would want to be doing. I spent big on boating and fishing stuff, cycling stuff, machine tools for woodworking, metalwork, welding etc, gardening machinery etc. I spent almost nothing on travel as I had spent my life travelling for work (I was a Platinum Qantas Frequent Flyer - yes, I am an Aussie) and the novelty goes out of that after the first 1000 plane trips and hotel stays.
. Fortunately, my wife is scared of flying so she was not inclined to leave home on big trips either.
Now, 17 years later. I am pretty satisfied with all the stuff I have and hardly spend anything on discretionary wants.
Now, I am most likely to spend the big $ on repairs to my house after being here for 40 years, albeit a third car in the household is probably on my list for later this year when they become more plentiful. (In truth, I prefer to drive my truck but it gets a bit bumpy for my wife and her car is too small for me so a full sized car is on the agenda for sometime. I got rid of my last full sized car at the start of the pandemic and new cars have been a bit scarce since then and I don't have the patience to sit on waiting lists.)
Even though I retired just before the 2007 global financial crisis when my retirement investments halved in value for a couple of years, despite drawing an income from those investments every year since then, my overall financial position, ignoring sunk costs like my house and furnishings, boat, cars, and various other grown-up toys is double what it was before the GFC hit. This is because I have followed the investment asset allocation formula suggested by then Retire Early website. ie mostly equities and some cash to allow me to sleep at night when the markets go backwards.
I hasten to add, though, that my wife and I are modest spenders, even if we do have multiple vehicles, five TVs and all the consumer goods that anyone would ever want. We just don't spend big on entertainment, dining out and that sort of stuff. Been there, done that.
I think that those formulae that say that you need a certain percentage of your pre-retirement income to live comfortably in retirement are nonsense. You just need to know what you are spending now and add a bit for your "bucket list" of desires maybe, but also recognise that going to work also has its own expenses that you will no longer incur and can save on. eg a lunch at home with your wife will be a lot cheaper than something that you buy at a cafe when working. Likewise, you will no longer need special working clothing - whether it be suits, safety boots or special cold weather clothes. Nor will you incur bus/train fares or parking fees to go to the "office". Fortunately, I live in a warm climate and spend most of my days in shorts and tee shirts.
I will add that I had read extensively on retirement subjects before retiring. eg books like "Your Money or Your Life," "The Millionaire Next Door," "The Joy of Not Working" etc etc etc.
I do spend a goodly sum on private health insurance even though Australia has an excellent good government funded universal health system. I do this because I don't want to be in any sort of a queue for public health services for anything. If needed though, I could live without that health insurance.