I'd like to chime in that this discussion lacks context. Preturbo injection was used on f1 cars whose sole goal was to meet turbo regulation size while making the most power. In jet turbines its about making ambit more flow for takeoff without have to stuff a larger turbine into the existing space.
I agree that in a drag rsce situation the goal is to size the turbo to the rpm range and gearing of the car or vice versa. It's also a lot easier to run a bigger intercooler. But in cases where instant throttle response necessitates a smaller turbine and compressor preturbo would be logical to reduce pumping loses since you gain the benefit of reducing the energy required to spin the turbine like in scca racing or hill climbs.
Also you will see most of its proponents in this venue and even there are skeptics. But the goal wouldn't be maximum torque as much as it would be choosing a turbo that can you accelerate you out of the turn the quickest and then trying to wring out as much flow from that compressor turbine combo.
It's the same debate for twinscroll and why no one with a gn cares. It has its purpose in specific contexts but that doesn't mean it doesn't work. But a twinscroll drag rsce setup makes less sense than a shot of nitrous or launch control which is more effective for the context,
