I think the biggest advantage of those is that, if done right, they can knock it out fast and keep the game moving.
This nonsense where stripes has to make an announcement, mosey on over to a hooded camera with a tiny screen, look at it 17 times, and then stroll back out to make another announcement is the height of stupidity. It's like a bunch of empty suits think that this is some sort of drama that people are interested in. Nobody wants to watch that nonsense.
Put me in a room upstairs with a cooler and 4 screens; I have until the next snap to buzz down for a review; if I do buzz down I've got 10 seconds to tell the white hat if the call has changed. Between the play clock and the extra 10 seconds that gives me over half a minute to watch slo-mo replays from multiple angles, which is more than enough time to see if something clearly needs overturned. If I can't decide in that time, it's too close to call, the call on the field stands, the play clock resets to :25 and we're playing ball in under a minute.