Indeed, how many of us do finish products? I don't. There are so many delicious products out there that once you find a new one, it's hard to resist it. So then the collection of the unfinished products grows. When I run out of space, I hold a party for myself and mix and combine all the unfinished products. Then it's anybody's guess.
I do all the time. I haven't finished my KMF creams yet (two pump bottles that are about 1 year old), but I've gone through several VDH pucks in the last year (usually have two mugs with a different soap in each mug going at the same time).