How do room correction or speaker calibration handle dips? Who does it right?

With room correction or speaker calibration software, I'd like to hear people's thoughts about how the different platforms deal with frequency dips caused by room modes.

Some dips are caused by room modes, where sound waves cancel each other out. Using a parametric EQ to boost that region doesn't solve that problem: you are making your amp work harder, at the expense of headroom, by throwing more energy into a null that will cancel out the signal anyway.

Speaker calibration platforms have their ways of addressing this without just boosting the region (e.g., Trinnov, Dirac, Sonarworks, Neumann MA1). I would like to better understand what they are doing, and what their different approaches are. Also would like to get people's take on which ones do it right or better.