EAPI 2 removal bug: https://bugs.gentoo.org/648050
It seems like tons of churn to update old stable ebuilds to a new EAPI, just for its own sake. Take https://bugs.gentoo.org/648154 for example. New ebuild added with EAPI 6 bumped from EAPI 2. Otherwise functionally identical. Now asking arch teams to retest and restabilize. Multiply by 100 or more. In the end we might get to delete some code from portage or an eclass? Does this seem worth it?