I don't know. I reflash mine between 20 and 50 times a day. I am on I535 Verizon 32 gb. On Synergy 326 and My theme. Running Ziggy kernel @172/384 with no voltage changes and no reboots or kernel related problems.
You restore your apps that many times a day too? When do you ever time to actually use the phone? lol
I was totally fine with the stock samsung touchwiz on jellybean since I got the device on release day up until now. Just wanted to try the multi-window feature. Doesn't seem to work as well with the GS3 screen size. I have a feeling the GS3 will never actually get it since it's meant for the Note 2's giant screen.