These assumed average selling prices show that MS is heavily tapping into Series S, while Sony isn't relying on PS5DE yet, they're not even close to meeting demand. It's perplexing that this gets overlooked and some dudes out here thinking PS5 will decline quickly. It's like PS5DE is not being considered at all. Very strange.
One of the obvious early indicators of Switch being a massive success was "room for pricedrops". Switch selling as well as it did year one at the $300 pricepoint meant that it was going to be a huge platform unless Nintendo made some silly decisions (short lifespan, separate 3DS successor, etc). Back then, a lot of us didn't pay attention to that, and now a similar oversight is taking place with PS5 which isn't really taking advantage of the cheaper SKU some 20 months after launch.
Switch managed to pull it off without any significant reliance on cheaper SKUs or pricedrops. But Nintendo always had that option as a safety net, and Sony also has it with PS5 (the standard model became profitable a few months after launch. Sony is more open than Nintendo to taking losses from hardware, and is also more geared towards digital).
Series X is also yet to meet demand in most markets, but I don't know if it will ever be produced in large enough quantities, and the demand just isn't nearly as strong as PS5 from what I can tell outside potentially the US/UK and a few smaller markets.