To me any lube is better than none.
If I kept every different spec lube including oils in stock I would need a whole new storage building. But since I have very limited storage space I have limited what is in inventory but there are special cases that only a certain lube works. Like some the equipment I work specs only a certain oil. Currently it is a Honda ATV that you can't use synthetic oil in it due to the wet clutch setup. Same with a Kubota UTV that requires the UTD2 oil; same type of wet clutching.