goddam you brent spiner why the fuck did you feel the need to kill off data I hate you
WHY OH MY GOD
No! This post is not okay! Data is fine: my DVD of Season 5 of TNG says so. Just ignore Nemesis, it didn’t happen.
TThis only happened because Brent couldn’t play Data after he got too old-looking since Data wasn’t supposed to age (and Trek actors really do have a tendency to revisit their roles yeeeaaarrrs after the original show aired - Nimoy in ST in ‘09 for instance.)
Since it was done due to a physical limitation on the actor/film-making, and not the character, I deem it Not Canon.