At certain very specific tasks it's going to have that 10x+ and more.
Also we've made 1000x+ gains from the times we had punch cards etc.
It will depend on the kind of projects you are working on, and the type of environment you are in. Is it a very large company or is it a side project.
In right cases it's over 10x+, in worse cases it's 10%+ maybe.
It may speak to however a type of movement that might happen is that there will be newer companies that will make sure they unleash a culture where AI first engineering is promoted, which might make it scale further than usual enterprise work currently can do. If a company can start small and lean they will be in a position to have a huge multiplier from AI. It's harder to get to that setup from a pre-existing large corporation stand point.