Great review. I wasn't familiar with this movie but I've put it on my list.

As someone who has made films for many years, one thing you said jumped out at me:

Consequently, when the production is burdened with constant delays, financial, technical and logistical problems or quarrels between people involved, it is more likely to result in film that many would call “great”.

I agree with this completely. The reason I think this is so is because it takes such perseverance to overcome the many obstacles and set backs that often come up during production, that you have to have something special in order to find the will to push through it all. Until I worked in the industry for a while, I never realized just how many films went into production and stalled out somewhere along the way, never to be completed or released. Some of these films had even gone as far as finishing principal photography, but ran into problems with editing, running out of funds, distribution, studio issues - the list of potential obstacles is endless. It is not an undertaking for the faint of heart!