I've looked around but haven't found a thread about it yet but what gets affected if I decided to roll back from DP to WP8.0? I've read that I would lose my app data, layout...but what else?
Why?
If apps on a sd card, will it automatically download them back
Nope. When the phone is set up, it has a unique identifier (which you can't see) and when you install apps to the SD card, it links them to that unique identifier. If you hard reset or flash your phone, that identifier will change and the apps on the SD card will no longer be linked. If it detects apps after this it will tell you they can't be used and must be deleted. Mainly to stop people installing apps to their SD card, letting their friend borrow the card and they copy the app/game to their phone, getting expensive apps or games for nothing.
But your apps will be up there to download again as that's stored in your purchase history.
Well I just rolled back and then upgraded to Cyan. Now that I restored from a previous save, 8.1 has also restored my start screen to it's previous state and also is downloaded all my previously loaded apps. Pretty cool.
I rolled back and then forward to Cyan. It wasn't too painful. definitely better than waiting around for them to patch it for me I always have to have my toys RIGHT NOW! :winktongue: