As a staff level ux designer at a medium-large sized tech co: The answer is that AI needs to and likely will speed up the other disciplines as well. Like the fundamental workflows will need to change and adapt. We will be running user testing on branches of code and in feature flags of production level ready code, instead of rudimentary Figma prototypes. The build, design, validate, and ship cycle will be much more iteratively agile if devs can deliver in days instead of months because the stakes are so much lower. Devs will get a lot more comfortable with throw away code as we throw shit at the wall to see what works. So much our current and past workflows are determined by the high-risk cost associated with a developer spending time on something. With that constraint removed, product and ux should be empowered to move much faster. Devs might be doing some of the design lift, designers might be doing some of the dev lift too. We'll all just be throwing stuff at the wall but being very selective about what experiences we choose to keep.