Building the annual plan doesn't have to be drudgery
I've never seen an annual plan remain perfectly intact 12 months on either... I imagine it happens with plans that are implemented blindly or not implemented at all.
Doing a SWOT for yourself is a good way to step back and frame your approach to an annual plan update. Hopefully that's a precursor to prioritizing within and across long term strategy pillars that extend past the 12 month view.