"If you're worried about concurrency when incrementing a counter, you're at a level of scale few people get to work on." I'm not sure I understand. If I make a

"If you're worried about concurrency when incrementing a counter, you're at a level of scale few people get to work on." I'm not sure I understand. If I make an application that has to increment a counter, shouldn't I always be worried about concurrency? What I mean is, sure, if I'm serving only a few requests, then of course the probability of running into concurrency issues is lower than a site with more requests/sec. But it's still a matter of chance, there is some probability that two requests will come in at exactly the same time and cause a problem.