Well the title mention unstable software but the article discussed about library or API. Topic wise, backwards compatibility is indeed really important and use

Well the title mention unstable software but the article discussed about library or API. Topic wise, backwards compatibility is indeed really important and useful. However to achieve stable API takes long time and effort. You're either use the tooling now and risking changes albeit small (honestly almost everything programming related has breaking changes at one point), or roll your own API.