My take and understanding is that it never really caught on, in part (again, my understanding) because while it built on some of Luria's ideas and evaluation techniques, I don't know that it stayed particularly true to them in the "translation" to becoming a psychometric battery.
I certainly think Lurian theory remains very relevant to the practice of neuropsychology, but there are likely more efficient ways you could spend your time than training on the LNNB.