The only exceptions were the initial batch of RMX expansions, which were material largely compiled from previous Akai-era libraries - and then they eventually bundled those into Stylus RMX anyway. I expected more expansions would come, but nope...
In the meantime, over the past years, they *could* have been building a large library of commercial expansions for all their instruments, especially RMX which would keep it's sounds a bit more contemporary to current production styles, but my point was they specifically chose not to do this, and instead invested their sound design effort into expanding the current instruments, or building new ones (eg Keyscape).
My pet joke theory about the lack of RMX updates is that everytime they finally finish the RMX2 content and get ready for release, they realise that five new EDM/commercial/pop genres have been created in the meantime, so they set about making sure they have content for those genres, then get ready for release and... rinse and repeat...
