I consider myself retired. I sold a tech company in 2013 and I'm investing the proceeds with @Joel Owens in some commercial real estate deals. Joel's right on the money though with having a purpose. I'm only 34 years old and while I could potentially live pretty well on the rental income for the rest of my life if I invest well, I want to keep building tech companies because it's fun for me.
For me, the goal of retirement isn't not working and playing golf, it's working on what YOU want to work on and eliminating as much BS as possible. Most jobs are 95% BS and 5% actual work. But real work is very gratifying. I plan on living entirely off of the cashflow from my commercial properties so I can afford to do the work that I really want to do, regardless of salary. In my case, it's starting more tech companies with my friends and not having to worry about taking a salary for an extended period of time.
I did move to Denver from the Bay Area because there are similar amenities but far lower cost of living and better work/life balance. I'm investing $2M into commercial real estate, with a goal to generate 10% CoC (200K/yr in cashflow). Goes a long way in Colorado. Other capital is in riskier investments for long term growth (stocks, Bitcoin, etc).