I’m kind of with you on this. Depends on who is in the room. If it’s a bunch of non-technical people, then of course they won’t get it. Know your audience. If it’s a bunch of tech people, they will probably just think the joke is stupid and roll their eyes.

...it's just the error message when the URL entered does not lead to a valid webpage? It's like when people "Google" something, they refer to the Google search engine. That doesn't mean they know the difference between a search engine and a web browser, saying a silly joke doesn't mean you have extensive knowledge in a certain field.

I agree, not sure why the down votes. this joke wouldn't land even amongst the devs I work with

Yeah, I got that vibe too - it's not a complicated joke & ppl have either heard it way too many times or just don't know the reference. But it's something to post about online, build your brand - like taking a standard generic photo for your field of work.