I see this was asked a while ago in Offer Additional Options for "Off Topic" Flag - however this was answered with a clear "no" because we were a beta site at the time.
Recently I saw this question: Work breakdown of data project and thought it was more suited to Workplace as it is primarily about communication between a project planner and a researcher - the latter happens to be in a data scientist role.
Could we now add a few more sites than the current "should be on meta". Obvious choices include:
Stack Overflow, for coding bugs or advice using core language features not related to data science (perhaps the question asker just happens to be working on a data science problem in that language).
Workplace, for work relation and behaviour issues that just happen to involve data scientists (maybe - we have a sample of one here that triggered my Meta question)
Cross Validation - maybe, although we'd need to be clear with ourselves what the boundaries are when something stops being a Data Science issue and starts to be suitable for that site. I am suggesting it regardless though, because having that migration target may give us data samples on what the community thought on this long-running issue.
Maybe other sites would also be suitable, based on potential migrations others have seen on the site? For instance I suggested Cognitive Science Stack Exchange recently for a question, although that is a beta site so not possible.