Don't forget that while we have competing interests and disagree strongly on many things - overall we are friends. When someone does something that works we all benefit. Sometimes we decide what "they" did is better can switch, other times we decide what "they" did is worth overall but they did develop something that we didn't that we can use. Even if "they" are clearly worse, "we" cannot do it all and so both of us specializing in something different results in both of us getting the benefits of both to at least some extent.
