But you can’t import any legacy Roland styles, right? Most of us who have had Roland arrangers (and everyone else with access to the huge libraries of older styles) would consider that being unable to import THOSE is what constitutes a closed system…
I merely looked at Roland’s own spec page and, under styles, there’s no asteroid and a description about style import… I regret I didn’t specify the difference between open style import and being forced to pay for curated packs of styles you may or may not like.
But, to be pedantic, it is still true there’s no open ‘style import’ (which is what most ARRANGER PLAYERS would consider the term means). Just paid import of packs that include styles you have no decision in their selection.
An arranger is just a tool. What matters is what you build with it..!