As a BE engineer when that happened, I had just started to become proficient in it, coming from Angular. I threw in the towel and went back to my backend world of peace and happiness. So he's not alone, these deprecations are insane.
I hear from the b/e people about containers, serverless, lambdas, ORMs, queues, schedulers, caches, pipelines (ok, I use these too), databases, API gateways. Oh, but it's podman now, not Docker. And they're moving everything off AWS to Azure. And there's three versions of the API my f/e needs to talk to still in production. And every micro-service depends on a different version of Node. Apart from the one that's in Ruby and the stuff from that department who only use .NET.
I don't believe this promised land of clarity, comfort and purity exists. It's just mess on both sides of the internet connection trying to solve different parts of the problem of turning user needs into money.
More often you inherit a stack and rarely you move away from it. And even if you jump on the latest infrastructure trends, there will probably be enough enterprise customers that they will support it for a while.
The beauty of this is that these technologies all tend to be optional, backwards compatible, and interchangeable. You make your choices when architecting depending on what you want to solve. You can build Hussain Bolt or Frankenstein. On the FE, just the landing page is a mission.
