Just to check, I hope everyone realizes that both a "traditional" shifter and a "shift by wire" shifter only change how the gear selector on the trans moves between P, R, N and D.
This trans does not have a manual valve body.
So with the "traditional" shifter, in "manual" mode, the trans is in "D" and it's electronic control that's setting the gears. Exactly the same as just in D.
So with a "shift by wire" shifter, using the
paddles, the trans is in "D" and it's electronic control that's setting the gears. Exactly the same as just in D.
In ye-olden-days, you could put a full manual valve body in a trans and have true control - the trans would go in the gear you select and that's it. Or even with stock valve bodies you could go down through the gears which would limit how high the trans would shift, but not how low. Modern transmissions don't do that via mechanical means anymore.
Anyway, all this to say, the ECU/TCU setup has complete control over how the trans will act. Having a "traditional" vs a "shift by wire" shifter has nothing to do with it. That's literally just what kind of knob you've got in the cabin.
IMO it's even funnier, because the "shift by wire" has an actuator bolted to the side of the trans that moves the manual shift lever exactly the same as the cable moves it for the traditional shifter. On transverse drivelines this is nice because it gets rid of the ridiculously long shift cable and lets them package the shifter however they want - which is why I expect we saw it on minivans and similar first. I do like that I can roll to a stop and just hit engine off and it shifts to park and shuts down. My wife's Subaru has a wire shifter and I keep forgetting to shift to park......