The rational blowup and torus-surgery conjecture for simply connected smooth 4-manifolds

Let $X$ and $Y$ be homeomorphic simply connected smooth $4$-manifolds. A torus surgery is a surgery on an embedded torus of square $0$, and a rational blowup or rational blowdown is the corresponding rational modification of a smooth $4$-manifold.

Rational blowup and torus-surgery conjecture. $X$ and $Y$ are related via a sequence of surgeries on tori of square $0$, rational blowups, and rational blowdowns.

This is presented as a slight weakening of the preceding torus-surgery conjecture, allowing rational blowups and rational blowdowns as additional operations. The source does not state that it has been resolved, so it remains open.