First of all, a HUGE thank you not only for what you have done for the global community of Stack Exchange users but for the times you have personally helped me, implementing a feature I suggested or fixing a bug I reported. Stack Overflow (and later other SE 2.0 sites) have not only made getting quality answers to questions easier, but encouraged me to give back to the community by answering questions myself where my limited knowledge permitted. Stack Exchange will not be the same without you, and all of us will miss you. Although it's hard to think of the site without you, I completely agree with your rationale for leaving. Raising your children and being there for them is truly worth leaving for. Again, thank you, and all the best in what lies ahead.

Just a couple of quick notes here: The automatic updating is not available on Linux editions of Chrome - it is the responsibility of the user to keep the program up to date using their package manager (such as APT or Yum). The browser itself has no means of updating itself (since this would require root privileges). Secondly, it actually is theoretically possible for a program to update itself while it is running - although a currently-running executable cannot be deleted / modified, it is possible to modify the binary machine code in place. Obviously this would be horribly complicated and introduces all kinds of potential errors - but I just thought I'd mention it.