I'm 33 and retired, and even though my spouse still has a year or two left in her career, we are pretending we are in ER and mostly ignoring her salary (which keeps building up in a cash account along with some smallish income from my side hustles).
We have budgeted $32,000 per year for retirement spending and that includes $5,000 or so for travel. $32,000 is less than a 3% withdrawal rate (which is comfortable for us given we have 5-6 decades of ER to fund).
This year we might spend $6000-7000 on travel since we are planning a trip to Canada for 5 weeks for the whole family and we already booked a week-long cruise to the Caribbean and Mexico (for the four of us, leaving the toddler back in the States).
I figure this is one of those good years of plenty. We are making a killing in the market, so we can afford to live it up some. That may mean blowing our $32k budget by a few thousand dollars.
If we were to lose 30% of the portfolio next year, I doubt we would spend anywhere close to $5k on travel!
Now that I'm ER, I "get it" with regard to withdrawals. No way could I stick to a fixed percentage plus an inflation adjustment. If the market goes bonkers (up), and we have $2-$2.5 million, we'll definitely spend significantly more than $32,000 per year.