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My 2019 Porsche Macan calls for 0w-20 oil in the USA and for 5w-30 oil in other markets.
I am thinking the manufacturers now are calling for oil grades to give them a slightly better CAFE (Corporate Average Fuel Economy) in the US and what protects better in other markets.
Not all manufacturer specs are based on what's best for the auto.....IMHO.
I am still trying to decide what oil I wanna run in my 1931 Model A with insert bearings. Probably 20w-50 synthetic sounds good to me though, as I'm in a warm climate with all cold starts over 50 degrees Farhenheit.