Comment #16 on issue 2719 by [email protected]: Patch: Brain surgery on the build system, first stage
http://code.google.com/p/lilypond/issues/detail?id=2719
As long as John plans to be available (i.e. not buried in a thesis for the next month like me), I think there's no harm in moving forward with this. Issue 2656 is not going to be fixed any time soon, so unless David wants to ignore windows (since it's a non-free platform) and have 2.16 right now-ish, there should be plenty of time to have a bunch of releases before 2.16.
