Locality of Behavior principle (LoB):
"The behavior of a unit of code should be as obvious as possible by looking only at that unit of code."
This principle is starting to get more and more traction. I like it.
You see it in components like React/Vue/Svelte. One file containing code, style, and markup.
Using this one-file approach in .NET Blazor / Razor is my favorite way to write for the web.
Tailwind CSS is also pushing this principle.
Gone are the days of abstractions on top of abstractions? I hope so!