You asked about opinions on them. I gave you my thoughts on the strength portion.
You need to be very careful with studies. They do not have cohorts of advanced trained individuals. They’ll take college kids who claim to have 6 months in a weight room and call them trained lifters. Because that’s as good as they can get, but that’s not your cohort anymore.
You should listen to your body and train how you like. But don’t throw the baby out with the bath water here.
I was going to say as well, I think 8 is indeed about that magic number for most things that aren’t a barbell. If you can’t get at least 8, even on your most fearsome effort, it’s probably too heavy to optimally contract what you want. You tend to end up trying to survive it moreso & execution can suffer. Not to say higher reps may not be better, but there’s not much benefit lower than 8.
Thanks for the advice on dips, I find that its really hard for me to depress my scapula when going heavy and they always shrug up. Ill try that!
I might be a little too young to understand "don't throw the baby out with the bath water here" lol
One of the reasons I also base my opinions on personal experience is because all of the greats did it. (not saying I apply their exact principles but they all learned from experience) (and I know gear was less of a variable back then since they were taking less than most people do now)
I've heard all of the greats like Jay cutler, Mike mentzer, Dorian Yates, Arnold, lee priest, Ronnie coleman, and more talk about their training style and they are all wildly different.
What worked for Jay cutler was high volume, very short ROM, staying 5+ reps away from failure on every set, and 45 seconds of rest between sets.
What worked for Dorian and Mentzer was 4 sets of chest a week with long rest times.
What worked for Arnold was 4 hours of training a day, going back and forth to the gym multiple times a day.
Lee priest and Ronnie had a more neutral approach to training as compared to the rest.
I believe if any of those guys trained with todays more "correct" training they would actually be smaller and weaker because they didnt listen to their own body and change their training style. Them listening to their own body is what made them great.
Even though there are arguably more correct ways to train, this just goes to show that even among the best of the best there is variability.
Those are simply the conclusions I've come to currently. They will change, I know that. They arent universal rules, they are just how I have adapted.