I only looked at it long enough to see that it reset everything instead of simply updating, but I did notice these things.
1. I lost all previously configured controllers (I’m assuming I would have to go through the whole process again of configuring my 8bitdo bluetooth controller)
2. Unused emulators were added back to the home screen
3. Emulator specific configs (ie shaders etc) were overwritten with defaults
I’m not sure if this is the case, but suspect it is, that it also removed Kodi and my lirc settings which allowed me to use a ir remote control. It is not worth “updating” if I have to reconfigure every little thing that I have changed to get it the way I want it.