steppers don't just lose steps.
Lost steps occur for a few reasons:
1 the steppers are too small for the application.
2 you crash the machine
3 the electronics are not properly setup, faulty connections etc.
4 you ask too much of them, ie. high acceleration
When working properly, the motors will only lose steps if they are overloaded.
As long as the motors have enough power for the application and are used properly, you will never experience lost steps.