I think my answer here are console games including a co-op mode without having an option for splitscreen. You have to play with other people who have separate consoles and separate online subscriptions.

Drastically reduces the playerbase and effectively kills the co-op modes when everyone moves on to other games (so, like, 6 months after release at best for most games).

Obviously lots of the AAA titles are getting too complex and taking up too much of the console's power to try to run it twice on the system, but in that case IMO just cut the co-op mode if you can't run splitscreen.
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Got a brand new blues that I can't explain

Worst trends in today's gaming?

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