Of course. Clear the desk slowly. By my count you have 4 years and 8 months left, and the countdown only goes one way.
How long until AI replaces riggers?
4 years and 8 months. I'd start updating that CV, but I can also do that for you.
Which riggers tasks will AI take first?
The ones that already happen on a screen, starting with: signal or verbally direct workers engaged in hoisting and moving loads to ensure safety of workers and materials. The rest follows.