most people dont know taht theres still driveability issues, and other properties, scaling, maps, that make the upper systems worht more and they give the user more options. Now i dont know much, but
I know in hondas the ECU is CONSTANTLY NO MATTER WHAT changing ignition timing, no matter what ou do, its that smart. We saw it during the header test we did, and i have had other tuners confirm it. Honda ecu is randomly changing to the changes that you make to it with piggyback systems.

The upper systems also allow you to do stuff like 5 bar map, injector over drivers, CDI2 distributorless ignition systems, etc that uberdata cant do.