https://github.com/dotnet/source-build/issues/1930 Here’s more info about the bootstrapping problem if anyone is interested.

The sequence of commits you’d have to build to get from one to the the other might be prohibitively long, and AFAIK nobody is tracking this. Fortunately we avoid using floating versions in our repos (we commit updated pinned versions into the repo source), so it should be traceable. But I don’t think we have tooling to do that tracing.

It sounds like it might be theoretically possible, but unproven and not at all practical in the current scenario.