well newgrounds isn't exactly new it's been around for ages but these features will certainly open up more options for new content types (i.e webcomics in this instance) to migrate or mirror over there
while i do think at least one of my stories could be housed there it's personally not my kind of platform in a general sense but i imagine for folks who may want more freedom with mature works might see it as an opportunity to host their work without dealing with tapas/webtoons level restrictions since NG allows for more so long as the content is properly labeled (iirc)
that's like i'm pretty sure there were a host of folks with comics on NG in the early days but since i wasn't a part of that community much less an account holder i didn't really keep up so if anything this may just spark a bit of a renaissance if it hasn't been experiencing that already