Once again, as you all know, I'm maybe 2 percent of the climber you are. I think of it like this... when you are climbing ddrt, when you wanna go back up, you walk your feet up the trunk and start hip thrusting. While this is normal, it's relatively inefficient for the human body. You are using your grip strength, arm, and back muscles to jerkily lift your body weight. With srt, you are climbing the rope like a ladder, using leg muscles to ascend. This doesn't sound like much, but it is, and there's more. A knee ascender doesn't really get in the way surprisingly, so clipping both to run up 20 feet becomes the way to go, where in spreading trees that's the majority of the work after working a lead, so i can toss my grapple hook to swing out to the next one, or redirect.
The cool thing with ddrt is the ability to easily climb back from awkward limb walks with your arms if needed. But with srt you can easily convert to a rads setup to do the same thing with a 3 to 1, so it's even easier. I use a handled ascender with a revolver, just clip it on, and clip the tail and I'm good to go. I also use it rather than just grabbing the rope, running blaze i find it's easier on my hands (grinder use over the years has me at the starting point of carpal tunnel, I'm to where it feels like I'm getting shocked a few times a day). Tending slack is also quicker and easier, way less of it.