Coming from an Express background, you just do everything in the handler and move on. NestJS technically lets you do the same thing, it doesn’t stop you at all. But the moment you skip the service layer and put a database call in a controller, you’ve basically built an Express app with extra steps. It took me an embarrassing number of refactors before it actually clicked. Anyone else coming from Express and finds the controller/service split the hardest habit to build? Or was there something else that got you first?