I have a quote that I put in my office in a prominent place. It says "Work done in the spirit of service is the highest form of worship." I really believe that and try to make my work a force of good. I feel too much work is a bad thing, but too little unfulfilling work is also not good.
Some people feel that if they were sufficiently rich, they will never work. I think one source of this view are the health effects of the sedentary lifestyle associated with tech, and I respect people who say that. It's all to common for people to be overworked in tech, so I understand people who want to exit for that reason too.
Still others, don't really enjoy work at all and would exit the workforce if given the opportunity. I respect that view too but it's not for me.
Because even if I had unlimited financial; resources I NEED to still work. I believe work, especially the kind that you feel is helping people and results in deep concentration called flow is beneficial for my mental health.
If I stopped working and entered a perma-vacation, I would go out of my mind. There are only so many golf courses, and so many days you can wake up late, before I would be bored out of my mind. When I go on vacation, I enjoy it and need it. But after about a week, I start to get bored and to miss work. I need a challenge.
There is a nice documentary called Born Rich by Jamie Johnson (one of the heirs to the Johnson & Johnson empire's wealth) in which he films the sons and daughters of billionaires (it's on YouTube). What I found fascinating is the happiest ones seemed to be those that applied themselves by working or in one case applying themselves in academia all the way to a PhD.
Even if I stopped my current start-up, I think I would find myself spending a few months catching up on technologies I didn't have the chance to catch up on, and imagine I would just start a new start-up after that.