Upper back work is important, but to be honest I think people sometimes get too dogmatic about specific row variations. I really don’t think it matters in most cases. I’ve done just about every kind of row over the years, and I haven’t really found any particular variation to be uniquely beneficial (for my goals at least). I tend to mostly gravitate to machines and/or dumbbell rows. I find traditional and Pendlay barbell rows to be a little too taxing on my lower back for me to justify including them in my program (prefer to save my lower back for squats and deads). I also find barbell rows to be somewhat of a hassle to set up as opposed to just grabbing a dumbbell off the rack or hopping on a machine. At the end of the day, I’m just trying to do some upper back hypertrophy and strength work to supplement the powerlifting competition lifts. You might have different goals, though.