This is definitely a concern--in fact, it's one that we need to solve in order to have distributed tracing work at all. A standard for in-process context propa

This is definitely a concern--in fact, it's one that we need to solve in order to have distributed tracing work at all. A standard for in-process context propagation is not planned for OT1.0rc spec, but I'm a big proponent of including that down the road. It sounds like you may have some experience and/or interesting use-cases, if so, happy to chat sometime, or feel free to drop by gitter/github and join in the discussion.