As long as you are below the maximum pulse frequency that your controller can process, there's no penalty at all to microstepping.
As long as you are below the maximum pulse frequency that your controller can process, there's no penalty at all to microstepping.
It's more complicated than that [0,1] and characterising it as a myth is dismissive and wrong.
[0]: https://www.faulhaber.com/fileadmin/user_upload_global/suppo...
[1]: https://www.njr.com/electronic_device/PDF/application_notes/...
But a full-stepping motor also has bad incremental torque for small displacements; by disabling microstepping you're just forfeiting the option to command them.
If anything, microstepping lets you run even closer to the motor's torque envelope, because you're less likely to induce a dynamic stall by either exciting a resonance or letting the stator's magnetic field get too far away from the rotor angle.
I can now find this article, but I think the one I remember reading also tested the torque in microstepping vs full step mode: https://hackaday.com/2016/08/29/how-accurate-is-microsteppin...