[rplst8]

If this is the case, then no one should lend any more credence to the term "full stack developer" than to the phrase "I like to work on all sorts of software" - because it's meaningless.

What I do know is that there are many dishonest types that will say they are "full stack" when they really aren't. Then there are others that will not lie on a resume and say they are, when they in fact aren't.

The reality is that any dev can learn to do both - but hiring managers want it all, now, for free, and with a smile.

All that said - the more disciplines and domains you use day to day, the worse off you are going to be IMO. Sure it's good be a polyglot, but specializing helps to hone and sharpen skills.