it's also just bad API policy in general. i favor golang because they adhere to the rule of not breaking APIs if it can be avoided. they recently added a breaking change for the JSON encoder but you have to specify it with a /v2 at the end of the import and enable the v2 codebase in an experiment. it's fine to make a new API for stuff, but you should retain old codebase and APIs, they have very low cost of maintenance so it isn't a reasonable action for a software project used by other people.