In a fun, social app, what's wrong with a fun 404 page?

I always appreciate easter eggs.

Now everyone's doing it. "Cute" isn't endearing anymore -- it's a tired technology cliche.

    $ curl -Is https://slack.com/404 | grep HTTP/1.1
    HTTP/1.1 404 Not Found

It's still there.

Not in the page body

It's really not that bad. I've seen pages return 200 with a http equiv refresh redirect on all places where 4xx errors and 3xx redirects would be appropriate... that screwed with everything that wasn't a real(-ish) browser.

404 doesn't need to say 'File not found' -- it's not a file, but a resource. But yeah, I don't know why it would need to say so in the page?