Language design and development
This is more relevant recently due to the surge in language creation. Sub-topics include:
- Posts by language creators about their languages; design, development, implementation, unique features, etc.
- Comparison of and/or expositions on language styles (stack-based/procedural/tacit, prefix/postfix/infix, etc.)
- In-depth explorations of the pros and cons of golfing languages vs. non-golfing languages (succinctness, readability, typing speed, execution speed, etc.)
I think this could be an especially rich field that PPCG members could contribute to due to the plethora of language creators and users of languages made by PPCGers.
Users who could write about this
- Wezl (knowledge about language design and development, but not much specifically about golfing/esolangs)
- You! (edit this answer)