Registration and DSP effects edit...

[alfaholic]

Registrations can not store settings for all DSP effects, also it is not possible to have style/song/right balance separated from registration, so they are not perfect and this is why I am looking at some other ways to use the keyboard more efficiently.
To put things into perspective, all brands have their registrations it is not Yamaha's invention, just they are called User Programs on Roland, and Performances (Pa3X and older) or Keyboard Set (Pa4X generation), and all do basically the same thing, except both User Programs and Performances/Keyboard Set do not have limitations I mentioned earlier. Both Korg and Roland store all settings in their registration, all DSP tweaks, they both have balance on a level independent from the registration, and in registration as well so you can choose. It will be better for Yamaha to make everything work as it should then making registration files small in size, who cares about that in 2019.
As for the size of style files, you can have millions of styles located on USB drive, the size is simply irrelevant these days.

[panos]

Thanks for the explanation my friend.
I didn't know that feature of other brands with the styles and the"start" variation.