Interesting that this seems (according to the article) to be driven more by perceived weaker demand than their inability to manufacture. A higher price than the PS4 and a weaker global economy would obviously impact demand. If the decreased production is just because they think demand will be lower, it won't be that much harder to get one compared to the PS4's launch/first year.
The Tokyo-based tech giant is limiting its initial production run in part because it expects the PS5's ambitious specs to weigh on demand by leading to a high price at launch, the people said, asking not to be identified because the subject is private. The global Covid-19 pandemic has affected Sony's promotional plans for the new device but not its production capacity, they added.