Mostly crafts - making custom t-shirts, or bags, and patterns for stuff like crocheting and knitting. But Ink is cheap if you get one of the Ecotanks from Epson - no way to prevent 3rd party ink, and it's a big tank so doesn't seem to dry out anywhere near like tiny cartridges. And 70-100ml of ink per color lasts a while IMO.
But laser makes a lot of sense for documents.