Small market place, its not about content, but how many people that have vr device. Alyx is a very special one that it have a very very large fanbase, they are ready to purchase the game even they dont have vr headset. And they can mod the game to play like a pc version. Like i said, the market place for vr is so small compare to other platform, so why do epic need to bother with it. Surely the engine will get some updates about vr development, but it will be like at the bottom prioty.