Some useful uses for Transform is for creating triggerable actions, like I’ve seen one MIDI keyboard lacking proper Transport controls (start, stop, continue), so it’s possible to workaround that by making some pads produce these messages.
Another interesting use would be to use Transform together with Sync Delay, so Transform converts some trigger message into Start, sends it to Sync Delay pipe to produce or drop Clock to nudge the pattern forward or backward. Similar technique can be used to manually trigger Arp steps, or even mess around with synced pipes like LFO or Delay, but not sure how useful that is in practice.
As Transform is such a versatile pipe, I think it would be useful to have a Deep Dive ( maybe borrow the Minibrute “CookBook” language?) which would show eachother in-context transformations that we might not think of by ourselves.