The estimate also misses the mark because the stakes were not disabling LessWrong for a day. When the button is pressed, only the front page goes down. RSS feed is unaffected, search engine results are unaffected, etc. Eg, see Slider, Measure.
A Fermi estimate: given the investment of time and money in LessWrong, I estimate that it creates $10M/yr in rationalist value. Not bad. But for a one day front page outage I apply a 90% discount due to diminishing returns and a further 90% due to only the front page going down. That gets me to $300 of value lost. Not nothing, but a different scale.
If I didn’t apply those discounts, and genuinely thought that $30,000 of rationalist value was at stake, I’d think that the Petrov Day ritual was a terrible idea! Given the 33% observed chance of launching “nukes”, that’s only justified if the ritual creates more than $10,000 of value. The claim is that the ritual increases overall trust, so this increased trust has to lead to at least a 0.1% increase in productivity. That’s a large effect size for (a bit more than) sending a bulk email that 100 people opened.
If someone loses a LessWrong habit, the impact could be positive or negative, depending on what they contributed to LessWrong, and what they replace the habit with. Most communities contain some fraction of members who would be better placed elsewhere, not because the community isn’t providing value, but because it’s now providing less value, or because new opportunities have arisen. Those people are disproportionately likely to drift away during a disruption. People for whom LessWrong is the best marginal use of their time will stick with LessWrong.
Relevant study: The Benefits of Forced Experimentation: Striking Evidence from the London Underground Network
Various non-essential services in the US are unavailable during Thanksgiving and Christmas, and this seems to be viewed positively overall. Overall, I don’t know what direction the habit-breaking effect would go. For the 2020 Petrov Day exercise I’d expect it to be small and net positive.