It's about the most expensive option, and also very good at removing heat over a large surface area.
It's also the reason, why Sony made a point of saying, their solution is equivalent to a vapor chamber, because they know, vapor chamber is the best, but costly.
No doubt because MS went the vapor chamber route, their cooling solution is the more expensive of the two.
Not the most scientific way to figure price difference, but looking at enough, you get a rough ideal.
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Basically a vapor chamber costs about twice as much as a heat sink with heat pipes, and also needs a heat sink on top.
My guess at mass production, MS is paying around $15 for their cooling solution, vs around $7 for Sony.
Personally I think MS has the better cooling solution, but time will tell.
The liquid metal is amazing tech in the PS5, but anyone wanting to take apart their PS5, will have to be very careful, and may need some on hand to re-apply if needed. But good thing, the PS5 has been designed that it may never have to be taken apart.