Funnily I find that the new and the shiny is a rebranding of the old and the stable. The difference is a new language + name + platform. I think this is an endless cycle as we see new developers come in and discover old concepts in new frameworks.

Once you've been through a few of these cycles it's easy to get jaded and burnt out, which is when older Devs may push back on the new. I don't think it's because they're changed adverse, just that they doubt the benefit of doing something they already know in the flavour of the month framework/language.

I'm guilty of all of this and have been through several burn outs. Nowadays I accept that everything will always be changing, and to keep an open mind to avoid dismissing things that are truly revolutionary.