Most of those technologies are deployment and infrastructure. There's Twitter the server program, and then there's Twitter the business. But whether or not an a

Most of those technologies are deployment and infrastructure. There's Twitter the server program, and then there's Twitter the business. But whether or not an app runs on docker, or kubernetes, or is version-controlled by git, or what database it speaks to, is orthogonal to the technologies used in the app itself (or at least it should be). I wonder if one had a source package for the Twitter server if you could just run it on an arbitrary device with an arbitrary configuration, or if it actually was bound at the hip to docker or mysql or whatever configuration they choose for their own servers. Ideally, they should be separate concerns.