> If it is limited to the kernel (including relevant JDK bits), then there are no issues with ensuring different feature pack maintainers are doing this, no need to combine lists from different parts of the build, no worries about ensuring only those bits relevant to what the user is actually running are loaded, etc.  Those things are the “painful to administer part”. They might very well be worth it but data should demonstrate that.
If it turns out to be worth it, the feature pack generation stuff could be enhanced to generate the list for each config. Perhaps only if doing -Prelease so we don't slow down everybody's builds while developing