Disney+ and Hulu are more integrated than they've ever been before. With the acquisition of Hulu, and the rollout of Hulu on Disney+ back in March 2024, the two services have slowly become one. Even with that new integration, it still made sense financially to have one service or the other right up until the price hikes in 2024. All of the Hulu subscriptions increased in price just enough that you'll only save $1 a month by not bundling now.
I myself got sucked into a streaming bundle last year when the price increases first arrived. As someone who watches various shows on Hulu, Disney+, and HBO Max I couldn't justify paying for any of those individual subscriptions after prices went up. And with new popular shows coming to Hulu this month, including a new season of King of the Hill and Alien: Earth, I think it's worth reiterating that a standalone subscription just isn't worth it anymore.