Well, I think a better solution would be to deliver all source code with the compiled software as well. I suppose that would extend to the operating system itself and the hope that there'd be enough motivation for skillful folks to maintain that OS and support for new hardware. Great, that would indeed solve the problem and is a potential outcome if digital rights are overhauled. This is something I fully support.

What is stopping them now from solving access to this data, even if it's in a proprietary format?

Really, again, I don't take issue with the abandonware argument but rather with the situation that I posted itself. Source code availability and the rights surrounding are only one part of the larger problem in the post.

Source code and the rights to it, aren't the root cause of the problem in the post that I was regarding. It could facilitate a solution, sure but given that there is at least ~20 years of data at risk currently, there was also ~20 years of potential labor hours to solve it. Yet, instead, they chose to 'solve' it in a terrible way. That is what I take issue with.