Eric is doing and has done what many do, start out in a discipline, learn it inside out, and then find out how what he knows does or doesn't apply to other disciplines. At the beginning, he was a bit I'm right, the rest are wrong, now, he is realizing that there is more or less to applying what he knows to the other disciplines. It's interesting to watch the progression and changes and admissions.
I found a lot of his info to be stuff I kinda knew about, or had my own ideas about, or had observed and never really thought about as to how to express, some of which he consolidated or presented in a manner that put it together, some reinforced, not that much in the way of new, other than maybe covering ign systems with Speedy. Lots of that info I may never put to use, but, nice to be aware of, helps to understand what could be causing issues, how to prevent some issues. If you listen to him long enough, he gives away his "secrets" in bits and pieces, and other people fill in some of his blanks.
I've found Glasscock to be probably as good, in different ways maybe better, F-Class John the same. Primal Rights is a guy that dives into rabbit holes, not wrong, just a bit of a zealot, and it's good info to be aware of. I like Little Crow a lot, his presentation is a pretty good summary of loading for some more practical stuff, and keeping in mind portions of what the others talk about, ie; saying this is neccessary, this is going down rabbit holes you most likely don't really need to explore, your choice.
I like some of the Hornady podcasts too, they start conversations and help educate folks as well. Vast difference between making 1 or 10 million rounds for one or ten or 100 catridges to fit 2000 or 200,000 or 2mil different guns and work as well as factory ammo does. There are things they have constraints on getting into, which is a shame, like to see or hear more about some of the stuff they go thru.
And like with many things, the more I learn, the less I know, no shortage of gray areas with ammo and shooting.