How much is it costing you annually?
with the two local allotments here, the chances of you get ANY allotment are very very negligible, let alone at the exact time you want one again.
getting the one you have now, again, anywhere I should think, is highly unlikely. Then IF you have put a lot into getting the soil 'good' that will definitely be a loss.
unless it's costing an unaffordable amount each year, I'd keep it and do what you've said or anything I thought would better the soul for when I retired. Plant something if it took my fancy, but not if I couldn't be arsed.
if you cba to get the potatoes, do you have a friend/neighbour who would enjoy getting them & having them??
I would quite like one at the closest allotment to me, but it's unfortunately still (realistically) a car drive away (3.5 miles. A bit much there & back frequently to be enjoyable) and after an accident last year I can no longer ride my bike (accident wasn't on my bike).
mind you, given the wait times for ANY plot, let alone the 'good' ones is LONG maybe I should put my name down. I guess I can always say 'no thanks' if one comes up & the timing isn't good. I was hoping to move to somewhere with a better garden, but it's not looking great as far as that's concerned , at the moment.