I see a lot of complaints about toy app size/complexity. There's definitely a judgement call to makes about app complexity when someone starts a project with a framework. I inevitably find that development in the middle/end of the project is substantially easier when using a good setup like React/Redux/etc or Angular, and changes are easier to make, whereas vanilla development is (relatively) substantially easier at the beginning of a project.

Yeah, Hello World might be expensive in size, but when you've got a substantially complex and fast app for not much more size, you start to feel the real benefits.