[satysin]

Personal opinion... You can always work a few more hours/weeks/months/years when your kid is an adult and living their own life but you won't ever be able to get those childhood years back. Also 50-60 hour work weeks are not healthy for you in the long term unless you are very vigilant with how active you are and take regular (every hour) breaks.

Also anecdotally I know several people who planned/hoped to retire in their late 30s/early 40s. None of them did and are still working now in their 50s and even one in their 60s. Mixture of reasons from health problems in the family to financial issues to just not knowing wtf to do when not working now their kids are adults and living their own lives.

[nunobrito]

Just to help with feedback, I'm one of those who retired before 30s. Not rich but enough savings to live on a (humble) tropical island until old age.

I wasn't able to stop. Applied my savings in day trading, everything went well until 2009 happened and most of it washed away. Applied what remained on the tuition of a top university to up my academic credentials and then went on try other tech industries (e.g. aerospace). Today have a small startup (Europe). Life is hard (empty bank account at the end of the month) but the plus side is that your brain keeps active.

If you really like writing technology, in my opinion it gets difficult to stop doing what you naturally enjoy doing.

[patja]

It is also easy to lose sight of the fact that once your kids are in their teens, they really start living their own lives much more so than in the past. You don't see that you are going to say goodbye to your days as the family's benevolent dictator, waking up in the morning and declaring "today we go to the museum" (or on a hike, or to the workshop to build something together, or ...) so make the most of those formative years while you are still the sun their world revolves around!