By their very nature almost every single JS library is a hip design trend. The fact that there are so many JS libraries as to warrant a Wikipedia page should prove that point. Most libraries have a specific use case they excel at, but the hype surrounding them usually is more than the usefulness of the library. Claiming that React isn't trendy is kind of like claiming BTRFS isn't trendy. It's being developed and used by Facebook. ReactOS can use it. At the end of the day it will still be niche until it either becomes bloated to provide more usefulness a la JQuery or stops being trendy and just does what it does.

No, I'm under 30 and React is probably a hip design trend, just like Angular and Bootstrap were. Perspective is valuable.

People are offended because the post you're replying to literally only said, "I've gotten less job offers since I turned 40."

Your response was, "well, that's probably your fault."

To rephrase one of your earlier comments, "I'm really not saying you're ageist. I'm just saying I've experienced a non-trivial amount of victim blaming that looks like this, and it's a possibility worth considering if you want other people to take you seriously."

No. That's shoddy reasoning:

a) Getting pushback on your idea is not necessarily someone taking offense

b) Casting react as a "hip design trend" is not - in and of itself - a statement about it's fitness for a purpose. It's a statement about popularity, and highly visible things should expect criticism.

c) Even if trendy is meant to disparage the tool as nothing more than a flash in the pan, I think that gets to my (unaddressed) point about hyperbolic language in unimportant discussions.

e) "The reaction proves the point" can be applied to any disagreement, therefore it doesn't reinforce a point without more substance that they're meaningfully connected.

d) It's still unclear what your point was supposed to be. My ask for clarity was not facetious, so far I'm only responding to the point I can infer but find flimsy enough that I preemptively conceded you might be getting at something else.