User blog comment:RemosPendragon/About our canon policy and the 8th edition/@comment-5940646-20170727093425/@comment-24909831-20170727212052

As you said; no one knows. New Primaris Marine -chapters are created straight from Primarch's gene-seeds, so they are essentially a new First Founding. Even if not presented in that way. And there seems to be at least one Space Wolf descendant too and no flaws are shown in Primaris Marines whatsoever. So if you were fancying an idea of a beatiful Mary Sue supermarines with no flaws and bigger, better, better equipped and everything then I guess Primaris are for you. Note that our timeline ends in 999.M41 so you have what... 8 hours of time to write their lore.

I agree with that it is reasonable to keep Primaris chapters in minimum now, when they are going for M42 and in M42 there is only Indomitus Crusade and Ciaphas Cain. Nothing else. None knows if there is going to be a next full Founding in 002.M42 all of sudden. None just knows. I don't like how the 40k has evolved into this kind of lore, but that is apparently what we get.

However, in the main text aare changes I propose into canon policy and I think they are reasonable enough now. Our canon policy exist so that the most outrageously stupid and... well, outrageous articles are weeded out before they are written.