Steve,
like you already mentioned it's in the hands of the bean counters and insurance/liability loss analyzers. They're not driven by logic or mechanics and they definitely have zero consideration for ONE life.
There's no way you can replace the ROPS with electronics, even if you got the Backward Roll Over Prevention system (BROPS

) down pat, there still needs to be rops protection for side rolls etc
Another thought, how about an electronic slope/angle warning device with audible and light alarm. nothing that would put the machine in shut down but at least a warning. Might be able to shame the manufacturers into buying into that, or get a lobbyist to get the insurance companies to require it?
That's something that could help prevent accidents, without the expectation that it's idiot proof and would absolutely prevent injury, in other words in requires human input, like the seat belt. As in reacting to the warning.