Excellent and informative article.
A friend had his inexpensive scope fog on an early morning of a Utah deer hunt. Not good.
I've used only Leupold scopes because, well, just because all of the other hunters I've hunted with when I was a teenager used them. I've never had a problem with a Leupold scope. I probably own a half-dozen of them, all Vari-X II, Vari-X III and VX-3's. My favorite is an approx 25 year old Vari-X II 4x12 AO that sits atop my 7MM Rem Mag. BTW, while this is personal preference (we all have personal preferences), I prefer smaller objective lenses so that my scopes sit as low as possible on my rifles.
Nothing compares with German anything. I used to own cheap binos. What the heck did I know? Not a heck of a lot. After glassing with cheap binos, my eyes would hurt. Finally I figured it out. I bought a pair of Zeiss 10x42 binos with zero buyer's remorse. I can glass for hours a day with absolutely no eye fatigue.
We might look though our scopes for 5 minutes a day. We'll glass for hours a day. Hence, I'd recommend a pair of German binos.
I do agree with the thesis of this article: buy the best glass you can afford. I'd go big on what is used most, and that'd be binos. Then I'd buy the best scope I could afford. If I were able to sink a couple grand in a German scope, I'd do it. But in reality, for my needs a Leupold is hard to beat. I shoot only to sight in, which amounts to a couple times a year.
To me, it doesn't make sense to invest big $$$ on a hunting trip and use equipment that is prone to failure. This goes for guns and scopes. A shot of a lifetime is just that: a one shot opportunity. I wouldn't want to blow such an opportunity because I went the wrong way on a scope.