Unfinished works used to annoy me, but at this point I get it.

Life happens, interest change and it's not like I'm paying for the whole completed work (in case of pro-writes), so I don't think I'm entitled to anything.

I do think, though, that (in case of fics) it's polite to put a note saying that the fic won't be continued. I really don't want to keep hoping for an update that'll never exist.