[kllrnohj]

Does not trigger the same (and spoken) response that at least Siri and "Ok Google" do.

And there are plenty of commands that don't result in a normal search at all, such as "ok google, what song is playing?" or "ok google, when is my next flight?"

[biot]

Of course, but both fall back to a plain old web search when the request can't be processed specially. In those cases, why not fall back to your search engine of choice?