I quit buying fabric in 2001 as a side result of decluttering my house with FlyLady.
Best thing I ever did as far as quilting goes.
Buying fabric and making quilts are apples and car tires
totally different things.
buying fabric releases dopamine. But it doesn't last.
Fold up your biggest quilt top ready for quilting, and sit it by your fabric stash. That will tell you approximately how many quilts you need to make to deplete your stash.