ram is a volatile commodity that, while difficult to manufacture, is not as difficult as say a gpu or cpu. As a result in the past manufacturers have been pushed to sell supplies at or even below cost. It seems like a no brainer to start up a new fab right now but the reality is that would take years to get to a point where it’s outputting any kind of reasonable supply and in that time prices could (and hopefully will) return to a much thinner margin

Apple could, for example, start up a fab. They have the cash. But it’s a lot of cash, it doesn’t stop (the fab needs continual significant investment to stay competitive), and when ram prices dive they are stuck holding the bag for this 15-20 billion dollar fab that needs several billion dollars a year to keep playing the game. This is why they stick to fabrication of things where they can differentiate (eg m series processors) and control the market. And then they can do what they’re doing right now: leverage their huge position to get far better prices than someone like valve, who’s barely a player in the hardware game, and ensure the architecture of their custom silicon maximizes ram performance (uma) and even use that influence to codesign new types of ram that align with their interests (lpddr5x)