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For me, removing NSFW (what will that even be defined as?) means 3rd party clients will have an incomplete experience.

I think that subreddits and posts already have NSFW tags.

Problem is that NSFW is used as a general content warning not just for porn. So if all NSFW content is blocked you lose a lot of non porn content too

Reddit also forces the NSFW tag onto content and subreddits for cigars and alcohol.