There are a lot of cute joint and glue strength tests and almost all of them add up to squat. They are great for youtube views but mean little in real life because relative strength doesn't matter. All that matters is if a joint or glue is strong enough. Guys get hyperbolic because polyurethane glue is weaker than PVA but in real life both are strong enough. I've built light duty shelving with nothing but biscuits and glue and they are all still going strong, some decades old. But I wouldn't build a table with biscuits. Learn joinery, the how and why it works, and don't worry about it. All that said, I admit I bought a biscuit joiner because of Norm and it isn't a necessity but has been handy. The Domino looks pretty sweet but whether it's any better than dowels, time will tell. My prediction is that once the patents start running out, the next big thing will appear. Woodworking is nothing if not faddish.