I've always found it best to allow the developers the freedom to use whatever they want as the official 'standard' and allow them to self organize into a few de

I've always found it best to allow the developers the freedom to use whatever they want as the official 'standard' and allow them to self organize into a few de-facto standards. You naturally standardize around better tech and attract better developers while not restricting future innovation. The one problem with this system is that it can be fairly easy to torpedo when you get new management who sees the lack of rules as a lack of organization. They will then enforce some arbitrary standard and waste a lot of resources figuring out their mistake.