Completely off topic, but I really don't understand the demographic of physics educators that are resistant to Dirac notation in a first QM course. It isn't really that hard to explain or understand, it's extraordinarily convenient, and it's essential for engaging with most quantum adjacent literature. I understand that it conceals the distinction between vector space and dual space a bit but it's really not that hard to get through. I may be biased because I learned the notation in week 2 of intro quantum, so I am curious if anyone with the opposite experience disagrees.