^ I don't think that Data's death in Nemesis was meaningless.
Data sacrificed a potentially centuries- if not millenia-long existence as an android in exchange for a man two-thirds done with his life. I like Picard and I'm sure Data was plenty happy to do so, but the arithmetic of NEM's end has always bugged me. And I can't help but feel that either Picard should have gotten his act together sooner instead of staring at Shinzon's corpse, or that a mind like Data's ought to have come up with something a little less suicidal. What's wrong with setting the phaser to overload, tossing it into the matrix, and running like hell? There were enough hull breaches in the Scimitar that Data could have at least gotten into position to ride out the explosion, though not without considerable singing. If the problem truly was Spiner's age, then having his outer flesh burned off would allow another actor to step into the role should there have been another film.
Fictitiously yours, Trent Roman