I'm sort of in this situation, come in 95%+ at around 915-930, leave at 4-4:15, walk around for 45-60 min after eating for 30 min. Most days, I go to the park and read for at least an hour. Get to work from home twice a week and often I'm cooking, doing laundry, reading on my balcony, going for long walks, lifting weights, biking, running. I'm logged in no more than 25 hours a week.
The funny thing is many of my co-workers often work weekends and nights, I don't get it, maybe I'm just more efficent?
I'm essentially FIRE'ed at 3.8% withdrawal, but want to get to at least 3.5%. This deal isn't bad, but still 5-10% of the time, routine gets interrupted by work and I can't do personal shit during work hours. Plus I only get 5 weeks vacation, I'd rather be able to go hiking and camping for like 3 months straight.