Hope everyone is good.
I came across an article and providing a link of it written by Alberto Ferrari which explains why DAX is tricky although it seems very simple to us.
Hoping this article benefits to everyone in the community since at large most of us are a beginner or intermediate learner and we all might want to be a proficient/master the concept of DAX.
Happy Learning, stay good and stay safe during this times.
Have a great day.
Thanks & Warm Regards,
[DAX is simple, but not easy] -