Tired Developer Debates That Need to Just Die Already

Nobody ever really says in detail exactly how their experience showed them that X is better than Y... but that's probably the most useful thing I want to know, and the most productive path discussion wise.

Granted asking them to go into detail would involve a great deal of work but that aside it is really hard to understand what anyone means when they make such blanket statements. Personally I really want to know those things as I want to learn about other people's experiences / how they reached those opinions, but I almost never see them.

Outside that it all seems to just be tribal garbage.