I know exactly what trail braking is, and I think to some extent we're all doing it unconsciously when entering any corner, because none of us are apexing every corner. This goes back to bicycles basically not going fast enough to overcome available grip.
But I will say with some certainty that any corner you're trail braking into could be taken faster on a bicycle by taking the straightest line without braking. Racing vehicles are basically never coasting. They're either accelerating or braking.
There seems to be a lot of conflating bicycles with motorcycles happening in this thread, and the similarities largely end at both having two wheels. When I'm exiting a corner, I don't have +150hp between my knees, just a couple of water bottles.
On a bicycle that isn't on a velodrome, exit speed is almost completely determined by the speed carried through the corner. You're either coasting and leaning, or pedaling through. There are limitations as to how much of each any of us can do.
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