Previously violence, nudity, and profanity would only end up on screen / radio after a certain time (9pm iirc).
In an on demand world, we're now expected (rightly or wrongly*) to make that decision for ourselves at the point of consumption. Couple that with platforms that make only hand wavy efforts to actually validate the age of consumers, and you have ubiquitous access to potentially inappropriate material.
Granted, the (seemingly) puritan basis of the large American streaming services means we won't be seeing sex and nudity on these platforms, but my goodness, as an adult, some of the gratuitous violence in even 15 rated content nowadays surprises me. Take everything everywhere and the gratuitous bloody beating to death with a massive dildo for example.. that's the sort of content that wins 7 oscars..
I'm aware that I sound like a right prude, and this has turned into a rant, but fuck it, digital content has moved so quickly that we've gone from Mary Whitehouse [0] to apathy in a generation.
*I say rightly or wrongly, because I don't think we in the UK have had a grown up conversation on that front. We're a complete nanny state, except for where we're not. Publicly broadcast material adheres to the watershed, but digital content seemingly doesn't need to.
0: https://en.m.wikipedia.org/wiki/Mary_Whitehouse
Minor edit to reference streaming services not culture