MAME documents what exists, it's a non-issue.

If they want to go after ROM sites hosting them, they're welcome to.

The best way to completely suicide their format would be to go after the ROM sites; as they're not the copyright holders of the actual games I imagine The Internet would annihilate them. Their reputation is bad in small circles right now, those circles would expand rapidly.

Convert them to some format that works right now and hope SPS will make IPFs in the future?

I think at least one of them is.
So which format would be better suited for MAME? We're free to choose here.

Any format MAME accepts where the game boots is OK; a straight sector image is fine for things that aren't copy-protected for instance.

"Unresolved" flux dumps, where you have the raw result of reading multiple rotations of each track are annoying to handle (kryoflux, spc, edd...).

"Resolved" dumps where someone extracted one rotation starting at a fixed position (such as the index pulse, or any position that ensures inter-track synchronization is correct), computed a nice "mean" flux change position, and found where tricky things like weak, unformatted or damaged zones are present are very nice, we love them (woz, ipf, mfi...)

"Cooked" formats where sectors are extracted lose information (contents and sizes of gaps), but it can be information that doesn't really exist in the first place, on unprotected stuff in particular where the "standard" system formatting is used. We handle a billion of them (there are usually like two or three per system).

OG.

Not exactly "new" by definition, but here's SPA2's backlog of ZX Spectrum dumps: https://docs.google.com/spreadsheets/d/1vsFypO47mjdWZ8vQ_qTM1zVx13VyU9mXds_muhbyNLU

Since I believe I've already been sent and added all the DSKs, the important stuff here would be the TZXs (if they weren't submitted to MAME already, along with the ones from TZX Archive).

Fresh from the Hidden Palace Discord server:




Granada.FAC0.bin

Looks like a prototype of version 1.1.

The ultra rare standalone cart of Cross High for the Supervision has finally been dumped! This makes all known released games for the system preserved. Also some more good news on the Game Master front, Shadow Warrior and Finite Zone have also been dumped which leaves only 3 known games undumped (Invaders, S-Race and Tank Battle) I'll keep on my quest to find them, but at this rate it will probably take a few more years to find them all...

Speaking of Game Master would be nice if someone could give the system some love and improve its driver as emulation is still far from being good

A while back F1ReB4LL raised my attention to an obscure japanese handheld called Bandai Design Master, thanks to the help of a fellow contributor we recently managed to buy a couple of systems and a bunch of carts for it (almost all of them actually), Team Europe will be taking a stab at dumping some of them soon so hopefully this will mean another completely forgotten system will finally be preserved.