I think there’s two different kinds of blackout - there’s the one based on stadium ticket sales that have indeed been gone since 2014/2015.
But there’s also the “blackout” rule that requires that only the local market game can be shown in that market. I think that’s what is being referred to - though I’m not sure how the NFL would get rid of that, it’s the basis for all of these premium out of market services, and it’s also built-in to the contracts with the broadcasters.