How many people are writing microservices just because it's the conventional wisdom to do so? Probably the best talk I've ever seen on microservices was a demo

How many people are writing microservices just because it's the conventional wisdom to do so? Probably the best talk I've ever seen on microservices was a demonstration of how to scale Identity Server to handle authentication for an app with a billion users. This is highly unrealistic for almost everyone but the speaker had actually done this (well, at least to 100M users) and the revelation I had from the talk is to design knowing how you would decompose a service into microservices IF YOU HAD TO and then respect those boundaries going forward. You almost certainly won't need to scale like this... but if you do, knowing how you're going to split up a service into microservices and respecting those context boundaries will save time now and allow you to scale to absurdity if you ever need to.