I would not count your example as one of moving fast and breaking things. What was really broken by changing the VCS? If you still prefer CVS over git for lame

I would not count your example as one of moving fast and breaking things. What was really broken by changing the VCS? If you still prefer CVS over git for lame super-conservative reasons that's your choice. Speaking as a python user, I guess your way of development is then to still code everything in C and sh? No thanks. I'm willing to update my code to newer, less insane, versions of a language - if the benefits outweigh the pain of course.