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Originally Posted by

My understanding is that with a custom/unlocked recovery, you'll lose the TA partition with DRM keys. So you'll lose out on anything that needs the DRM keys. If a root exploit is found, then you could use the standard ROM with root and not touch the bootloader/recovery/TA partition. But as soon as an update rolls out, you'll lose root again (and likely the exploit with it).



Backing up the TA partition means that you can restore it to stock (i.e. to sell or for warranty repair).



Again, as per my understanding - any AOSP/CM based ROM will lose any of the Sony proprietary software and features anyway, no different to Samsung or HTC in that respect. I remember having a HTC One (M7) last year where the camera was worse on CM because HTC used their own post processing software within their camera app.



In theory, it may be possible for someone to come up with a stock based ROM with root baked in that keeps some the Sony proprietary software etc, but this is unlikely I would say.