Yes, but in that case, we actually found a way to get kernel-mode access. And even before then, you could give flash0 another name, an important part of the process of writing to it. Now, we can't even do that. Flash0 refuses to be renamed, and there's no kernel mode. So this isn't just a matter of finding a kernel access exploit anymore. It's a matter of figuring out how to rename flash0 when the system absolutely refuses to do so.

From what I've seen, the general consensus among developers - including folks like Fanjita, Dark_AleX, and Mathieulh - seems to be that downgrading 2.80 and above won't happen for a long time. We're talking about several months here, possibly even a year or more.