It depends what distribution you're running (and what time we're talking about, ten years ago was a different situation), but if you're on a mainstream long-term release like Ubuntu, Fedora, Suse and so on, it's pretty smooth nowadays, on average at least.

Yes, there's still the 1-2% of roughness around the edges, but as OP pointed out, on linux you can actually fix stuff. It is definitely not an "april fools" worthy statement. Linux is really stable these days.