Hulu certainly has some content diversity so once they take full ownership of it and flesh out their strategy for D+/Hulu, they solve for that problem. Also, I believe that many Fox titles are slowing being brought back in house from other streamers which should also push up the overall content available. I think all this rapidly moves them closer to Netflix in breadth of content more so than any other streamer.
I'm curious if the other companies let Hulu tank once Disney owns it completely.