MrMartG: Many times over the last month I keep coming across this outright lie from developers.
"People are demanding shorter games"
(snip)
I am one who is. We have had numerous others (people, and posts) corroborating that. True, it's not all, but a not-small set. For many of us, more important than "shorter" is "completable" and "respectful". A lot of games pad length in in ways that make it just grueling and unfun to complete, and disrespectful of the player's time.
There are numerous people who complain about how games complete vast swathes of content that they'll never experience because the game gates it behind various systems and checkpoints (often to pad time in a different way). Again, it's less about "we want shorter games" and more about "we want games we can play and enjoy".
One of the few benefits of achievements (that really should just be dev metrics) is to see how far people get into games. I've done that plenty, and you can see clear patterns of "well here was a giant cliff after which few people progressed compared to before". For 80% of buyers, in those cases, the game would have been the same if it had been cut off there. Again not that devs should necessarily have done that -- but it gives them an indication that something is wrong and that players are either burning out, or losing interest, or reaching a hurdle (or something) where they should probably take a look at fixing that. Creators hate creating content that their audience isn't going to be getting to.
So, in short, you haven't looked at all. People don't want games to consume their lives for months to be able to complete.
EDIT:
Here's one game that comes to mind. Hyrule Warriors. Even just the base/first Wii U version (before the later revisions that added more) had way too much content that it was impossible to get through it. And I love "Koei Warriors" games! It was a mix of the above -- certain bits I would have enjoyed getting to were locked by some too-hard combinations, along with there simply being too much (needless padding) content, a little bit of high repetition to make it easier to drop. But in general it would have been just way too long to complete, so I stopped where I was and moved on to other games.
EDIT2:
Another one, God of War (PS4). Pretty darned good game, but not worth completing. I got to the end of the story, but there was a lot left to do that was just not worth it. It would've been nice if they spent some of that "end game side stuff" dev time on another chapter of the main story. I'm not technically asking for a longer or shorter game in this instance, just that they put in a lot of wasted time-consuming content that the game may have been better without.