oh yes, a metronom block you could put where you want in the layout, and add delay to it
Yeah,
At that point you'd have to ask, "What would the metronome sound be? Just a click, or could you upload some kind of audio clip that'd be played back in a loop?"
And then: If it's a clip, must it play endlessly until stopped? Or can you set it to play once and then stop?
And: How long can the clip be?
And, how do you trigger the clip to start at such-and-such a time? How do you synch it to MIDI time?
At that point you have a new block which isn't precisely a looper, but has some of the same underlying capability.
And to be honest, "pre-recorded clip playback" is of more interest to me than a looper (although the looper is cool, too). When playing live, I'm more interested in tapping a button to trigger a sound to play for a certain duration then fade away, while I start playing something else. (E.g. the sustained last note of the solo in Rush's "Limelight.")
Anyhow, if you're gonna put echo on the click, someone's gonna ask why the click isn't a side-stick or a conga. And then, why not a repeated bass note, or a whole 2-bar rhythm clip of Porcaro's beat to "Rosanna." (Always more fun than a metronome click, y'know.)
So I figured I'd cut to the chase and take us to the natural end of the conversation!