Diki is talking about the native arranger on the MS, which is totally useless as far as "standard" arranger functions.

Live Styler is add-on software that HAD to be introduced as the MS arranger was so bad. Even DC admitted as much.

And even then, LS is pretty ordinary on the MS, with quite a few styles glitching out, particularly the "busier" ones. Which is to be expected really I suppose, as it IS another layer of software running via the Windows emulator (W.I.N.E.) Which adds its own issues as well.