As always, the only concern with aluminium parts is if the gearbox housing will turn into the weakest link?
Going from stock to CF takes the repair from a regular event, to an occasional tower swap which takes less than 10 minutes and virtually no risk of dropping/losing bits/getting dirt in the gearbox housing.
Going to an (essentially) flex free aluminium tower........... whats that going to do to the gearbox housing? And how long does it take to swap the housing? A while.
(And as with all the RDRP stuff, when are we actually going to see it?)
I daresay i'll end up with one tho