I believe React developers think in terms of Components now as we used to think of Object/modules in the past. I personally find it easier to encapsulate logic

I believe React developers think in terms of Components now as we used to think of Object/modules in the past. I personally find it easier to encapsulate logic into a Component because it seems more tangible than a plain JS file/module. You can also nest React components to compose logic, for example: composing multiple shaders.