I have never pulled nor considered a (professional) all-nighter. No project I've worked on has been that important, though I can think of some situations that

I have never pulled nor considered a (professional) all-nighter. No project I've worked on has been that important, though I can think of some situations that would be. I have left the office after 8pm (11-12 hour day) a handful of times, mostly when I broke things late in the day, or when we were migrating something large during off-peak hours. I don't consider working late a valuable tool to have in my toolbox. I'd rather deliver ahead-of-schedule, estimate more appropriately, and turn down work that is overly high-pressure. FWIW I'm an employed developer and my employer would never ask me or anyone else to do this, in my estimation.