User blog comment:Argorrath/Black Ops III - Reveal Trailer released/@comment-5290320-20150426202821/@comment-3967954-20150427150907

The WWII CoDs had no kind of plot to keep them going and next to no characterization (bar BRO, CoD3 and WaW). Sure, they were fun at the time, but these days gamers expect a bit more than random disjointed missions with menial objectives like "plant the satchels" and "hold your position", especially when there's not much motive to do so; no big reward in the form of plot progression.

I guess you could say the more recent CoDs do the same thing, but to not nearly the extent that the WWII games did.