"Source split" or something like that in "modes" of the Splitter, that would essentially create a new "ghost track" from that point of the insert stack, so that you could use it as Send on Sidechain in the latter effects placed in the insert-stack of the same track.

I.e.

1. Add some effects as inserts
2. Add Splitter as insert with Source split mode
3. Add some more effects like delay and reverb as insert
4. Add a Compressor as insert
5. In Compressor you are now able to pick the Splitter-generated Source-point as Sidechain Send

Why: Much like with all the other modes of the Splitter, this would drastically reduce the number required FX channels / complexity of your project. "Dry ducking" with particularly delays and reverbs is such a basic thing, there should be an quicker and easier way to do it.

If there is already a way to do something like this that I haven't yet figured out, please feel free to provide some guidance!

I think this (+11) thread is about the same thing.