Before anyone asks I’m not advocating for React here, and also far from being new to this game. Btw, do you count Vue as old or new? Which version? Is 3 “established”? Would you hire a Rails guy for Zend?
Scary as it sounds, this happens more than most people realize because it stems from directed marketing in structures where financiers are making the decisions and the engineers are just expected to adapt. I don't know about the developer arena, but in industrial automation (my field) new tech and software gets pushed frequently based on whether or not a bean counter said it would improve efficiency, not because it was tested in that specific environment. It's a constant headache for integrators. The number of times I have had to sit and listen to a room full of salesmen explain to me why we're suddenly using Y when X was working just fine is ridiculous. They see in dollars, and to them, testing the new software or component in the working environment prior to making the call is a waste of dollars when weighed against how many dollars they will save with expedited implementation.
It's maddening, and probably the prime factor that makes my job unpleasant.
The "adopting a tech with minimal thought" bit was about high level decision making.
I have no particular thoughts on Vue's newness or oldness because front-end JS is a frantic treadmill that I'm glad to not be involved in.
As for "would I hire a Rails guy for Zend?"
As I said, unless I'm desperately patching holes in a sinking boat, where I need you to jump right in and man the bilges with your indepth $framework knowledge, I hire first and foremost for a proven ability and willingness to learn and an attitude that makes you a good team fit.
You could be Rasmus Lerdorf and I'd reject you if you weren't interested in learning new things, and I'd reject you if you were an asshat, even if you're the best Zend developer ever, because if you're an asshat, you're going to lower the productivity of my team.
So would I hire a "Rails guy" for Zend? Yes. It's not like a Ruby framework is so massively different to a PHP framework that you need 10 years of Zend to make the transition.
But then, I'm biased,I self-taught in Python, focused on Django 1.0, got hired by a Java shop, started in Tapestry, then Wicket, then focused on backend, then went to RH to work on an K8s operator built on Vert.x, then ended up working at a Python shop 15 years after my previous in-depth usage of Python, working on a Django 4.0 app, and then FastAPI apps, even though I'm not a "FastAPI guy" nor a "Django guy".
Funnily enough though, I am a "Kafka guy", but now so are a bunch of my colleagues because I focus on sharing the knowledge.
To be clear, I wasn't hired to be a Django guru, or a FastAPI one, I was hired to implement code that satisfies business needs, in a manner that involves Django or FastAPI.
And yep, I've learned a shit ton about modern Django, but I've been productive since day 1. Because I enjoy learning and want to learn.
So yeah, I'm totally hiring that Rails person for Zend work if they've got the right mindset and the right fit.