The entire global launch within this year is in the same production cycle, including Malaysia. Don't think Sony has made any revisions to the hardware yet and even if they did, you won't see those units until sometime late in 2021.

Every PlayStation before had a minor hardware revision only after a year of launch. Same goes to pretty much every console ever made. Don't see why or how that's changing, considering there's a pandemic going on.

The difference this time is that if your launch day console were to fail, there are no replacements for you - not immediately at least. Warranty is just a superficial statement.