Imagine a solo developer, writing an app that is composed of packages/libraries/crates from the get go. Now in one place such an engineer uses pandas 2 in othe

Imagine a solo developer, writing an app that is composed of packages/libraries/crates from the get go. Now in one place such an engineer uses pandas 2 in other place pandas 1 but it is just one single app. What does it say about the quality of engineering and mental focus of such a solo developer that cannot accomplish same thing with the same API - OR cannot refactor the already written code for Pandas 1 to Pandas2. Sounds to me like more of an engineering discipline and engineering mindfulness problem. Fix is simple with a simple rule - everyone has to use the latest major version, always. Micro services do not make any sort of people's communication go away, they move it to different boundaries. From dependencies to the business layer/interfaces which is lot harder to navigate and negotiate. Imagine needing a field in your downstream service. They refuse because they don't see it their domain and you cram it on your side and what not. Ask anyone working in micro services environment and they'll tell you it is a recurring issue every quarter if not more.