Epson 3880. Been printing on glossy/luster papers exclusively for a year or so with PK/gloss black ink. Just went to shake all carts (as I do every month or so), & noticed MK/matte black cart is dated 2015 and about half empty.

Been saving some images for matte papers, & could switch over to use it up, BUT... does age affect image quality, and, every bit as important, increase probability of plugged nozzles? I already have a new MK cart on the shelf, and could simply install it before switching over. Don't want to waste ink, but then, it's not that big a deal to toss & replace.

Any comparable real world experiences here?