since it's 2021 and the world is still locked down can you ask the Toraiz Team whether there is the possibility of making the operating system of the Sp-16 accessible to the users for experimentation and to work on developing open source OS alternatives? Even a closed beta group of trusted individuals e.g. certified owners with real interest of improving the OS would be a start. Of course without the ability of monetizing and under Creative Commons licenses if sth would be developed.
Pioneer could still provide the latest official OS + support and is legally not responsible for 3rd party solutions (=install at your own risk), but giving the option would open up a new world of possibilities eventually unused with the machine.
This was already asked for in this thread with many great ideas and feature implementations: Open-Source OS, so people can help with features (https://forums.pioneerdj.com/hc/en-us/community/posts/900001262603-Open-Source-OS-so-people-can-help-with-features?input_string=Sp-16%20Opening%20the%20OS%2FAlternative%20third%20party%20operating%20system%20option)
Let us, the user community know if Pioneer would be interested to use the idle resources waiting to be unleashed.