Yes, I think that is the primary problem - they invested in Zipkin. At the end of his talk, he mentions the idea that you should prioritize core functions and u

Yes, I think that is the primary problem - they invested in Zipkin. At the end of his talk, he mentions the idea that you should prioritize core functions and use vendors for everything else. But he's right that some person created that code - and thus it becomes difficult to get them to switch. And instead it becomes a huge source of technical debt for a company that is non-core to their mission.