I'm quite far from FI, but I had a bit of an epiphany the other day that confirmed that this is the right path for me.
A few years back, I was in a really toxic work environment. Underpaid, overworked, an @sshole of a project leader, away from home Sunday afternoon through Friday night for going on five months straight, etc. It was just a miserable, miserable existence. I hit my tipping point when the @sshole mentioned (at a dinner with managers and senior managers that I, for some unknown reason, was invited to despite being very junior) that he knew he was burning the staff workers (ME!) out with the excessive hours requirements, but it wasn't like they had to pay us more for the overtime so the project was wildly profitable because he could bill for all the extra hours and his staffing costs didn't go up (meaning he was going to get a huge bonus.) I started looking for a new job that night, but kept working the miserable one for four more months until I lined up something new because I had bills to pay, little savings, and seemingly no other options.
I happened to meet up with a couple coworkers from back in those days last week (both of whom also moved on as soon as possible after that disaster of a project) and we were commiserating about it and I said, "If it happened today, I would quit immediately." And it's both profoundly true and something I didn't realize until I said it out loud.
I have a long, long way to go, but at 32 with $235M in invested assets/cash savings and $45M in debt, I could quit immediately if I found myself in a similar situation today. I could move away from my super-high COLA city and use cash savings to bridge the gap until I could find a different job that would cover a more modest monthly expenditure of $1,500 plus my current $1,000/month in debt service. And my situation will only continue to get better as I move down this path.
Nothing changed drastically in my situation recently, but since I came to this realization I have a whole new perspective on my money, my career, and my life. I can only imagine that this feeling of freedom I have right now will be one gazillion times more intense when I actually reach FI.