Products
Development, features, pricing & roadmap
Product knowledge is not just features and roadmaps: it includes the decisions behind them, the trade-offs made along the way, and the understanding of why the product works the way it does.
The most fragile product knowledge is not what was built but why. Feature lists and roadmaps are usually documented somewhere. The reasoning behind them, the customer problems they were meant to solve, the alternatives that were considered and rejected, that knowledge tends to live only in the heads of the people who made the decisions.
When product teams change or grow, this reasoning gets reconstructed imperfectly. New team members make decisions that conflict with earlier ones, not because they are wrong but because they are missing context. The same debates get had again. The same mistakes get made.
Product documentation at its most useful captures current state (what the product is and does), recent history (what changed and why), and the principles that guide future decisions. It is a working reference, not an archive.