The hurdle is identifying and addressing those ports that fail to build or work when built as PIE. That was already in progress from others in the community - I've added those as "Depends on" entries in the exp-run PR.
@emaste Yeah, that was a cheap shot across the bow on PIE. D38047 is what I really want (to keep my local patchset size down, and it should be ready to go if it just got more eyes on it)