I like the angular style guides take on this: > Flat > Style 04-04 > Do keep a flat folder structure as long as possible. > > Consider creating sub-folders

I like the angular style guides take on this: > Flat > Style 04-04 > Do keep a flat folder structure as long as possible. > > Consider creating sub-folders when a folder reaches seven or more files. It goes more into the why on the actual guide https://angular.io/guide/styleguide https://angular.io/guide/styleguide