hmm.. My original idea for 'platform version' was for, say, the version of 'runit' in this case, not necessarily the OS+OS-Version being targeted. Init is a weird example just because "sysv init.d" systems are so wildly varied it seems to make sense to target OS+OS-Version (Ubuntu 12.04, etc) and in this case (runit) say version '2.1.1' or whatever.

Thoughts? Are there crazy cases where Debian (or others) would patch runit to operate in a way that merits targeting specifically in these cases?