Both the Pokemon Distribution Machine Gen II / Gen III discs are dumped, along with the memory cards. So from a data preservation point of view that data is safe and backed up which I'm pleased about.
The original hardware went on to someone at Project Pokemon interested in getting this working for all to enjoy, so it's great that ended up in the best possible place for the Pokemon community to hopefully one day be able to use these distributions in some way.
The data not been out there for anyone to freely tinker with years later is not an ideal situation I agree, hopefully that is something which can be changed.
Deoxys explained the situation on emulation and what works / doesn't in far more detail here: https://digiex.net/threads/pokemon-gen-2-3-pcny-distribution-machine-save-downloads.15872/#post-82340 - worth reading if you haven't already.