Arthur, the fully electronic shutter in my E-M1 MkII allows it to shoot 60 fps in raw, among other things. The fact that it allows SSs of 1/32,000th is a by product of its existence.

Many other mFTs cameras also have electronic shutters.

One benefit that's often not appreciated is that they are utterly silent. No mirror slap and no shutter sound. Great for not spooking nervous wildlife (and humans ... ).

IOW , not a gimmick.