The incremental gain don't happen because they don't increase weight or reps. You have to make that choice. Powerlifters make gains in that regard because they put more weight on the bar. That's the only way to get thereWell, I probably don't know what you mean by progressive overload. What I mean by changing up your workout is to have heavy days, medium days and light days. Someone people stick with heavy days all the time for an extended period of time and there's no incremental gain in weight or reps performed. So in those cases, it would be beneficial to do medium and light days.