AMD has HIP out. It is now down to us to implement it. Initially core25 was supposed to be hip. Due to issues with other stuff, core26 was born, which fixed some issues, but had other issues, again HIP integration to backseat. Core27 then was thought to have HIP. But it was pushed without hip to make sure that all the issues with core26 were fixed on 27. It seems we have majority of things fixed now, so I hope core28 or revision of core27 will have hip, as excuses and reasoning is running out now
AMD will listen if we, as in FAH, have something to show and tell them that things can be improved, etc. I cannot tell them anything right now because we have nothing to work on yet.