Nah, not true

I'm waiting to see whether that box will still be upside down

For me it's not true either. Especially when copy pasting I'm revisiting the code and fix some tech dept and sometimes catch small bugs.

This is why you run a universal styleguide with easily editable variables (I.E. SASS Mixins) and have a unified base style set - Can’t have no bugs if you consistently test and develop the universal styleguide to the latest standards

I do this actually. I have pre-made code that I need too often.

I could write a library for this. But most of the code needing the things I write, are closed source and companies don't want to pay to have a private package.

So I just copy/paste on to the project.

And normally, I'm the one that dictates the style guides and the paradigm used. Copy/pasting feels like the code belongs to the project right away