Because roland says: that system-1 will get extra updates, where you can program your system-1 to be “something new”…
as in… every now and then, they give a new bit of firmware to upload to your machine… not just a bunch of patches, but more like a plugin for your machine… They even said something like that about tr-8 … more updates with new “machine-modeling”.
I dont see a big difrence between the two ideas, except terminology…
Idea1: Lets strip our machine, so we got room left, to only upload the machines we need. so we get custom monomachine.
idea2: Lets build a machine, with room to spare… so we can make difrent modules users can mix and match, so they end up with a custom roland machine…