I would think kind of like a piano button node could be helpful...
it sends out 0, true, trigger as long it is been pressed an hold... and 1, false, no trigger when it is been released.
+1
I have a request in for several button types (momentary, toggle, radial, etc)
The only way to achieve this now is to use a bool in piano mode.
For wire, Triggers are event's so they would need to be signals to make this work.