I don’t think (nor have I stated) that the 3D hack is a bad hack, per say, but it is indeed a hack. When hacks can ultimately be replaced with designated properties, I think we’re on course for a better system. Nonetheless, the will-change property comes with its own set of complexities, and I think we have some way to go before properly optimising animations and CPU/GPU usage. It’s still a relatively new frontier in front-end development, so I’m sure we’ll see changes and improvements constantly!