https://www.luckygunner.com/lounge/why-you-arent-better/
From my point of view, it is very useful article for people who want to be really proficient shooters. According to the author, in addition to the common shooting mistakes , there are at least nine other reasons why we cannot reach perfect results.
I enjoy Hickok45 videos too. He is an interesting narrator and a good shooter. His modified Weaver stance looks unusual for modern shooters; however, I love it.
https://www.youtube.com/watch?v=A1Cf0WEeXZk
For me, Weaver stance or its modified variants are more flexible and appropriate for narrow and closed spaces like buildings. I believe these stances have real advantages during clearing rooms and shooting from cover.