Everyone in the bike vids is trash talking direct mount derailleurs, but from what i'm reading they are an improvement on the older hanger style? YT vids say they will fuck up your frame when they get bent, but i'm pretty sure the engineers thought of that when they made it. The technique everyone uses to bend their hanger back into shape looks like it could fuck up your bike frame or back axle.
https://www.youtube.com/watch?v=pxkE4F5nKTE