Better control of noise footprint.
Less moving parts.
Less maintenance.
Less unfriendly lubricant.
No need for TRDS alignment.
More freedom in tail rotor design compromise.
More options in MGB layout.
but will you match the power and controllability of a conventional TR? No one is going to give up performance just to replace a system that is both reliable and mature technology.
I'm sure there are plenty of problems with maintaining electric motors in the aviation environment and Elon Musk already acknowledges the issues with cooling high performance motors.
As to noise footprint - the TR still has to move the air whether it is driven my a driveshaft or an electric motor and the unequally spaced blades that already exist in modern TR, especially Fenestrons, have already significantly reduce noise footprint,
It seems an odd solution to a problem that hardly exists, especially since the crash that sparked this discussion doesn't look likely to be a TR drive failure anyway.
BTW I wouldn't hold up RIPS as a great success - it is very power hungry and heavy.