I write CSS in CSS and my JavaScript in JavaScript because at some point abstractions pile up into this massive cognitive burden for anyone adopting your code,

I write CSS in CSS and my JavaScript in JavaScript because at some point abstractions pile up into this massive cognitive burden for anyone adopting your code, especially when they didn't follow the exact same path as you technology-wise or if they're newcomers. I want my work to be pick-up-and-play, not RTFM x 20 abstractions and tools.