The short running time today on half-hour anthologies is a good point. All current broadcast and basic cable television has been severely damaged by the time lost to ads. Premium cable hasn't really used its freer format. It seems to me they are keeping the broadcast act structure.This seems to be for two reasons. First, they seem to be writing with broadcast syndication in mind anyhow. Second, it's easier to fake innovative writing by taking advantage of the freer standards for sex and violence.
However it most certainly is a competition. An anthology show can't just have an audience of millions, it has to have an audience more millions larger than ongoing series and serials that might have their spot. Currently we have no anthology series. I am baffled as to how someone could say we have both with a straight face, even in an impersonal internet format.