I believe oil(s) will continue to be a topic of discussion for years to come.
I use a Mobil 1 0-30 (down from 0-40) because my oil pressure was high after the latest rebuild.
0-40 was used (factory-fill) so the Gen III could pass emissions (which it barely did) by "making" the camshaft profile smaller at idle (by collapsing the lifters), which did the trick for testing and is also why these engines clatter like they do.
Over the last 60 years, I can't say I've ever had a "bad experience" with any engine oil from any manufacturer.
Like makes of cars, trucks, lawnmowers, boats, sleds, motorcycles, etc; I think it comes down to whatever you have had good luck with.
Engines don't "require" thick oil for any reason unless they are totally bagged smoking pieces of crap and the owner would like it to smoke/use less.
Heavier oils and hence higher oil pressure does rob an engine of power and fuel economy which is why manufacturers use the light stuff; same with trucking fleets, submarines and anyone else paying attention.
Motor-On Gearheads!!
Ronnie