Last year I did an interview and during the "systems design" phase I was asked to design a video streaming platform for 500 million simultaneous users. For a pl

Last year I did an interview and during the "systems design" phase I was asked to design a video streaming platform for 500 million simultaneous users. For a platform that has maybe a few thousand users, and is very unlikely to every get more than 10,000s users because it's just not general enough. I never did find out if the test was to recognize that the number was off-the-walls crazy and that this would be the largest platform on earth by a substantial margin, or if they really thought that was a reasonable number. I suspect it's the latter :-/ I didn't get hired anyway, so... I've also seen microservices for B2B software with low-hundreds of users. If the number of users is within an order of a magnitude of the number of services, then your developers are in need of adult supervision and a spanking.