Oh, man- there's gold in them thar piles:
We mulch them up with the lawnmower and put them in (large) compost bins (with chicken manure and kitchen waste).
By next summer they'll be dark brown soil for the gardens. Waste not, want not....
We did notice last year’s leaf deposits in our woods have slumped into a gooy mass. You’re perfectly welcome to help yourself down here.
Might even throw in a pontoon ride...