I do think anything above a T rating should be DLC-only, and that DLC shouldn't contain much or anything that more family-friendly players would want.
Like if they want to release a Wicked-Whims-But-Official DLC (Get F***ed? lol), or Basemental-But-Official (Get Wrecked?) not sure I'd buy it because my style of gameplay doesn't call for it, but I am sure it'd sell like hotcakes and I have no problem with it existing and EA making money off of it and people who want it getting to incorporate that into their game. What would stink is if the cutest hair or clothes or furniture in the game was also behind that paywall.
Whether they do so with Sims 4 or Sims 5, if they DO ever go M for Mature, it should be entirely optional and skippable DLC, and anything with that DLC that isn't M for Mature should be available in a cheaper T-for-Teen Stuff Pack DLC.
