It would be nice to have an external note trigger option within all modulators. A sidechain trigger integrated in all modulators would allow for external triggering of modulation types beyond the basic envelope found in Note Sidechain, such as the 4-stage, or the parseq8.
There would be a sidechain button on all modulators that would enable external triggering. It would open a menu where you select the input (just like on the Note Sidechain modulator).
We have the Note Sidechain modulator, but it just triggers an ADSR envelope. A note sidechain trigger in all modulators would open many more possibilities.
An example of where you would want to use this feature would be if you have a long Note, and want a 4-stage, or an LFO to be triggered rhythmically across that long note. This would allow you to do that, by having a rhythmic midi pattern on a separate track, triggering the modulations.
It expands on modulators, which is a core Bitwig feature, and sidechaining.
One very cumbersome and rather inflexible way would be to have the modulator you want to be triggered placed directly onto a Grid patch on the track with the notes you want to use for the sidechain. Then assign that modulator to a value module on the Grid patch, and route it to the output of that patch. Then, you could put an audio sidechain on the track you wanted the modulator on, and assign it to whatever parameter you wanted to modulate.