You can draw whatever folder diagram you like. The honest picture of your app is which module imports which — the direction of the arrows. Get that wrong and no folder structure will save you.
Every codebase grows a shared/ folder, and given enough time every shared/ folder becomes a junk drawer. Not because the team got lazy — because the folder was never given a rule. Here's why it rots, and how to keep it boring.
FSD is one of the best frontend methodologies out there. Used without thinking, it turns a complex component into a scavenger hunt across eight folders. Here's what I learned.
Flat folders are fine until every feature starts touching routes, queries, forms, permissions, and UI state. Here's the React structure I use when a TanStack app grows past the simple stage without turning FSD into folder theater.