The issue with people saying "this is the best" or "no it's not so nyah" is that those people almost never provide any sort of justification for their stances.
Anyone here can click on my System Specs and see what's in one of my builds. I have never claimed that those are the best. They work well enough for me where I didn't return or junk them. That's basically it.
Let's say Person A says "Noctua is the best." Don't think Noctua is the best? That's fine. If Person B thinks something else is, let's see their peer-reviewed comprehensive analysis table of every single valid product in that category and a detailed justification why Person B thinks Product X is "the best." Otherwise Person B's opinion is no better than Person A. In fact, it's actually worse because Person B didn't take the opportunity to back up their statement.
I read reviews because many of those people have tested a wider range of products than I have. In some cases I have zero ability to assess a product category. Power supply units are one. Properly evaluating a PSU requires expensive, highly specialized equipment and substantial knowledge of electrical engineering as well as a lot of time. I don't have those resources at my disposal.
If you want to say "I am happy with my KitchenAid stand mixer/Noctua cooler/Rolex Submariner" that's fine.
An even stupider comment is "____ is overpriced" again without justifying it. How do you measure value of PC fan? CFMs per dollar? That's fine if you don't care about acoustics. Or db(A) per dollar? That's fine but maybe the fan doesn't provide enough cooling power. And the same fan that excels in one usage case might be insufficient for another.
Are you happy with your Casio wristwatch and your cheap Walmart sneakers? Great. They do the same thing as a $200 automatic Seiko Divers Watch and a pair of $500 Italian loafers.
In the end some people use "the best" or "perfect" without understanding that some other people will stupidly take those statements literally. The concept of hyperbole is lost on some. So at least online at places like TPU's Q&A forum, it's safer not to use "perfect" "best" or other superlatives. There are too many idiots around here who are chomping at the bit for some ridiculous dorkwad pissing contest.
And not just here at TechPowerUp. More troubling is the fact is the increase of people who really don't get this and worse don't contribute anything of long-term pedagogical value to the original conversion.
Those people are excellent candidates to put on an ignore list. It really improves the signal-to-noise performance.
Returning back to the original topic, I believe there are some boutique PC case manufacturers that are American. Hyte is one of them, their headquarters is in City of Industry, California.
Solidigm is a new entry to the SSD marketplace. This is the Intel NAND division acquired by SK Hynix. Solidigm is headquartered in San Jose. Are they American? South Korean? Up to OP to decide. They apparently use (formerly) Intel chips.