Marvel for one reason and one reason only.
DC's continuity is totally FUCKED. The got it right ONCE with CoIE with it's reeboot, and ever since a writer comes around every few years thinking they can do the same thing but only ends up fucking it up worse and worse. At least with Marvel, we know what is or isn't cannon 95% of the time (I'm looking at you Hyperion 2016!). DC on the other hand, it's really hard to say what is cannon, non cannon, or half cannon.