Hi Nicolas - thanks for reading and commenting. Yes, I try to respond to every comment, even though it can sometimes take a few days (just like with my email ;-) except for the emails that are spam, subscriptions I don't care to cancel, etc.). "Emails" in this essay are a stand-in for whatever it may be in our lives that we can never finish/complete but we're always trying to, even at the expense of spending time on something more important. That thing usually makes us feel bad because we can never be on top of it, never be done with it and it is often the subject of optimization tools, hacks, etc.