[JSWolf]

Adobe can upgrade ADE (RMDSK) all they want, but until all the apps and all the Readers upgrade as well, it won't matter. Basically, we have to use what's built into ADE 2.0 because we have no idea what version is going to be in use by the people reading. The problem is one of stagnation. Bluefire is a good example. It is using some version 3 RMDSK, but I doubt it will ever use the latest version. Kobo is using maybe some version 3 RMDSK but I doubt we'll ever see the latest version used. So what has to be done is to have to use less features because otherwise they won't work for a majority of users.

Now we have Apple and a new set of issues. iBooks was a problem when the 1st gen iPad stopped being supported because Apple didn't make proper hardware back then. Eventually it because OK to stop supporting iBooks on a 1st gen iPad. But, not we'll have iPad 2-4 in use with an older iBooks and yes, they will have to be supported even if iBooks gets more features and/or bug fixes. Apple will never release a new iBooks for these older models even if it's feasible to do so with iOS 10.