Developer productivity is a wide bucket that covers everything beyond the actual code: terminal setup, shell aliases, AI-pair-programming workflows, focus and time management, keyboard layouts (Colemak, Dvorak, ZSA Moonlander), note-taking systems for engineers (Obsidian, Logseq), and the small workflow tweaks that compound over a career.
The honest truth most of these courses encode is that 80% of productivity gains come from the same handful of habits: a clean editor with strong navigation, a fast feedback loop on tests and types, decent terminal hygiene, and saying no to meetings that don't produce decisions. The other 20% is taste in tools.