Then if you have some of those old newer and more opaque devices too, you would be doing the world a service to reverse engineer their formats with your favorite AI tool and publish them somewhere. For all the conflicting takes that people can harbor about using AI for vibe coding, technical writing, or creativity, the opportunity it provides for documentation/archive enrichment is tremendous.
So many people would be delighted if six months from now we had "SwellJoe's Sysex Wiki" with docs and scripts for a bunch of recovered sysex formats and some prompt/harness/skill tips to help others expand and enrich it further.
I've built apps for all my old synths, not just to save sysex patches but also for midi control. It's actually amazing some of the hidden features these old synths have that you didn't even really know about because Claude finds all the connections in some cryptic sysex addendum in the manual.
No longer own that synth, but I still have my backups. No reason to believe the raw files would not still work. No dependency on any special software.