from the article: "Being able to debug any past production code is a huge step up..."
this is pretty epic. but it also means you need to keep track of what version of your code ran every past workflow because you need to run it the exact same way when you replay it, right? Is there an easy way to track in workflow metadata or something which version of a worker (commit sha or something) ran a workflow?
also i love the beginning section about history. It would be awesome if every article I read about some new technology started with a reference to how whatever-it-is really grew out of PARC or bell labs or some research paper written pre-1980.
