@drahardja @AdeptVeritatis Sure. There's a big difference between finding content "from the outside", as it were, and finding it "inside".
We don't have to imagine content on Twitter not found on Google - that's already in play. But even when it was found, finding content specifically on Twitter was better approached by searching on Twitter - it had metadata Google didn't index.
That's what I expect from a good fedi search tool, as well.
Firefish antennae are a good example. That, but over the entire fedi, in real time, and with more query expression power.