If it was me I would finish it as everyone said your grams would love it if you did. She died doing what she loved quilting. I"m sure she died of old age or maybe she was sick but the quilt didn't make her die. I see to many times quilts are just put away in hope chest and just rot from no use. I would get it and find fabric if you don't have the same one so what it will be a generation thing now fabric from gramma and fabric from you and maybe your mom can help to and add something to it so it's a 3 generations quilt. I wouldn't care what the historians say it all changes as the times change. This is only my opinion. Some quilts end up at goodwill cause some people don't appreciate the work that went into that quilt. But you do appreciate this so go for it and quilt till your heart is content.