I've run all types of extruder drive systems (other than belt drive) and a lot of extruders, and like I said, there was no difference in print quality.
And change of direction being tough... You're kidding right? Those little gears do not even come close to the mount of torque required to re-direct a delta effector or cartesian carriage, particularly at high speed. Extruders run at such a slow speed compared to the printer that it would never get enough momentum to cause this difficult change in direction that you speak of. If the motor couldn't even handle a low speed direction change, it wouldn't have anywhere near the torque needed to extrude filament.
Again, I agree with you to some extent on the ratios (and printed gear wear), but the rest is just ridiculous.
And change of direction being tough... You're kidding right? Those little gears do not even come close to the mount of torque required to re-direct a delta effector or cartesian carriage, particularly at high speed. Extruders run at such a slow speed compared to the printer that it would never get enough momentum to cause this difficult change in direction that you speak of. If the motor couldn't even handle a low speed direction change, it wouldn't have anywhere near the torque needed to extrude filament.
Again, I agree with you to some extent on the ratios (and printed gear wear), but the rest is just ridiculous.