I think Borland is great example of what happens when you don't care about backward compatibility and try to milk your customers all the time. Even since Turbo

I think Borland is great example of what happens when you don't care about backward compatibility and try to milk your customers all the time. Even since Turbo Pascal, and with Delphi, every new version (5->6->7) of a compiler/tool required new compiled libraries/components. Eventually a lot of shops (and Delphi and C++ builder were huge in xUSSR, for example) stopped to care and moved on to Java/C#.