I guess it depends on how the pay actually compares.

If the tech salary is more than the trade salary, every year you hold on is more runway for the eventual transition. Even if it takes you longer to get into the new thing because you were slow jumping ship, the extra runway might cover the difference.

Obviously I've had similar thoughts to the ones you're having. But this is a pretty cushy gig and I don't think leaving it before they make me is the right decision.