They work pretty well, but I share your frustration toward the proliferation of driver patterns.
With Torx in particular, you can't really tell the difference visually between a T15 and a T20, or between T20 and T25,
and the same fastener in different lengths might take different driver sizes.
I regularly deal with, and often carry in my pocket, T15, T20, T25, T30, PH2, PH3, S1, S2, S3, square/phillips combo, 1/4", 5/16' nut drivers, SAE and metric allen key sets, and 1/4" and 3/16" slotted screwdrivers.