With Microsoft now owning GitHub, the technical teams have been integrated, resulting in Azure DevOps and GitHub having the same leadership and personnel. The long-term strategic direction will be GitHub, but there is no plan for Azure DevOps to go into maintenance/sunset; therefore, choosing Azure DevOps is entirely OK in short to (undefined) medium term. Azure DevOps is currently in the early stages of development. When migration tools are needed, Microsoft will give them.