One more angle: reliable & internalized abstraction vs unfamiliar one. Java string is abstraction over bytes. I feel I understand it intimately even though I h

One more angle: reliable & internalized abstraction vs unfamiliar one. Java string is abstraction over bytes. I feel I understand it intimately even though I have not read the implementation. When I try to understand code fully (searching for root cause), and there is String.format(..), I don't dig deeper into string - I already am confident that I understand what that line does. Browser and linux api I guess would fall into same category (for others). Unfamiliar abstraction even with seemingly good naming and documentation, will not cause same level of confidence. (I trust unfamiliar abstraction naming&docs the same way I trust weather forecast)