[meiraleal]

> This is bad advice

*For you. I think it's a obvious and great advice, software engineers shouldn't define themselves by their stack (Java programmer?).

> They'll have an even more difficult time finding a job if they decide to switch stacks now.

That's why planning your career on changing stacks is such a good advice: you do it before you really need. I have kept a main stack and a "side project" stack for my whole career, going from PHP, ASP, .NET, RoR, clojure, Python then JavaScript for the longest with Rust currently as the side stack I'm learning. Had I got stuck on PHP I would regret it badly.

[ps256]

You're confusing the general "don't limit yourself to one language" which is good advice, with the specific "OP's problem in the past year has been that they know Java and are looking for Java roles" which the GP commenter has no way of knowing and is extremely unlikely to be the case.

[meiraleal]

Just assume you made a confusion when you got the wrong understanding to state it is a bad advice. You can do that in place of trying to change OP to fit a narrative.