There was a day I only built with aluminum nipples figuring there would never be a problem using the highest quality available ... Wheelsmith and DT.

Then I started restoring vintage bikes and saw the error of my thinking ... I won't ever build with aluminum nipples again because they fatigue and break over time. Oh And they galvanically corrode to the steel spoke like a reverse frozen seatpost. But since they are easy to break you can replace them.
But it's several years out so if you keep that in mind they only offer a weight savings. I only use 4sided spoke wrenches on square nipples.

What a reverseal for me... Now I toss the aluminum nipples and buy (or get them free) brass nipples.

(I'm a secret closet fan of Shimano wheels with aluminum nipples at the hub with straight pull aero spokes and deepish dish rims, call me a hypocrite)