There are no savings to be gained by installing a binpkg of packages in these catagories versus merging the ebuild normally. Perhaps a new flag that an ebuild can set to inhibit making a binpkg of itself? to work around this, i've taken to adding the following to my make.conf EMERGE_DEFAULT_OPTS="${EMERGE_DEFAULT_OPTS} --buildpkg-exclude 'virtual/* sys-kernel/*-sources */*-bin acct-user/* acct-group/*'" Reproducible: Always
You'd then break usepkgonly.
It's somewhat related to the idea in bug 885827 combined with bindist.