Mazda Naturally aspirated Engine oil viscosity choices (0W-20 and 5W-30)

This is actually a question not unique to mazda skyactiv engine family. But the i feel like mazda is the only brand that doesnt have a bunch of people arguing on why you shouldn’t use 0W-20 oil, maybe is because mazdas uses direct injection and high compression engine. A lot of people say to not use 0W-20 engine on hot climate areas like my country, but even the local dealership uses 0W-20 on a car with 100000 kilometers. What is your experience on using either of the oil viscosity??