All of the extra free hours you are spending could be used to build your own product that you would have a stake in.
Eventually I understood I just like building stuff, the monetary compensation is just a bonus. If you let me build big enough stuff and pay me enough so that money is inconsequential, I'll be happy, at least temporarily; the end game is taking a startup "all the way", but what I'm doing now is an indispensable lesson in large scale stuff.
Thanks, that's really insightful. I've been trying to minimize my work hours lately, but am starting to realize it might be that I'm not enjoying the job as much as I should be.
Seems like the ideal job would be one that you _could_ get done in minimal hours but _don't want to_. If you find yourself in that situation, you have a lot of control of your work/life balance.
At that point whether you are doing it for yourself or an employer doesn't matter as much, though it's pretty hard to find companies that measure employees on output rather than input. Or rather, ones that understand that more input _from a given developer_ won't necessarily deliver more, or at least higher quality, output.