Gotta be careful though, because while NGE indeed feels way past the expiration date on spoilers, the Rebuild movies definitely aren’t (the final one came out just earlier this year). And people online definitely like to bring up Rebuild movie spoilers in conversations about NGE. Mostly due to how very inter-connected, yet, at the same, disconnected NGE and Rebuild movies are from each other.
TL;DR: agreed on no need to be afraid to spoil NGE, but we gotta be explicit that it applies only to NGE (+the end of evangelion movie, which is the true ending to the show that is absolutely a must-watch; also imo past the expiration date on spoilers), and not to Evangelion as a whole (which would include recent Rebuild movies). But there is no harm in putting a spoiler warning at the beginning, and that’s a nice gesture towards those who might want to watch it for the first time without the storyline being spoiled.
TL;DR: agreed on no need to be afraid to spoil NGE, but we gotta be explicit that it applies only to NGE (+the end of evangelion movie, which is the true ending to the show that is absolutely a must-watch; also imo past the expiration date on spoilers), and not to Evangelion as a whole (which would include recent Rebuild movies). But there is no harm in putting a spoiler warning at the beginning, and that’s a nice gesture towards those who might want to watch it for the first time without the storyline being spoiled.