Debugging Multi-threaded Applications: Some Tidbits

I was lamenting that we haven't really done terribly much to make multi-threaded debugging easier in say the last decade and I was fortunate enough to be able to have a conversation with Brain Crawford about it.   Brian is a long-time friend an colleague, we worked on the VC++ debugger years ago, he's the lead architect for all things debugger these days.  Anyway, he gave me this succinct