I wouldn't call it ultimate sidechain tutorial as it only mentions ducking and not modulation, and especially the way reaper handles sidechain modulation with its pin-in connector routing can lead to some unique modulation. Also using third-party plugins for tutorials of specific daws is, well... not very ultimate at all. Doing ducking is better and easier to just use automation on volume slider, or specific eq shelves.
I disagree. Enter: project with 400-600 clips in the playlist. Lets say 200 of them are kicks. and another 150 are snares. You'd like me to worry about adding an extra 350 clips to that, and then also make sure all of them are where they need to be / in time? Lol