With the very recent release of Atlas prime, I feel like this is an appropriately timed question: Do prime warframes still fit within the lore? Or are they just fancy deluxe skins now?
Ever since Valkyr Prime, it feels like warframes have moved from "original orokin-made designs" to just whatever the artist decides to create. The way the Leverian talks about Gauss, you'd think that was the original version, not the Prime. And there's also the case of the Chroma quest; if it had been wandering untouched for centuries, wouldn't it still be Primed?