@veff As a reccomendation play prime trilogy with the upscaled textures on primehack (a modded dolphin emu fork).
But to be honest i'm not really surprised with the development time of prime 4, technically metroid 5 (dread) has been on and off development hell since like 2 or so years after the release of metroid fusion and zero mission, nintendo legitimately wanted to have both a 2d metroid and a metroid prime on the DS but only got prime hunters and prime pinball...