I would argue people should have been watching Avatar years ago and there was no good excuse.
Literally on IMDB ratings it is rated #14th top tv show of all times done by user ratings.
https://www.imdb.com/chart/toptv/
And 6 of the things above it are Nature / Space Documentaries. Being 14th means it edges out The Sopranos at number 15th (I love Avatar but The Sopranos is better, side note Michael Jordan’s The Last Dance and Chernobyl are two recent things affecting the top 10s.)
Really people should have watched Avatar, like yesterday.