@hyc @nikitonsky I would perhaps put this differently, that people often have wildly inaccurate estimations of complexity. In both directions (for different cohorts). So it's silly to suggest you'd just bang out a quick caching system and have it be robust in production, at least without a lot of work. But it's also silly to suggest that X person is incapable of it. If they take the problem seriously they're going to be just as capable as anybody else, more or less.