I've just received a notification for the End of Life for Blackboard Open Content (xpLor) as of 31st December 2019, with Maintenance Support Mode from 30th June 2019 - see https://blackboard.secure.force.com/apex/btbb_articleview?id=kAA39000000PB5IGAW .
I don't think this is a great loss; I remember when this was launched it sounded promising, but it never seemed to take off. I created a training video for our faculty to use it, but have never seen it being used. Some of the Khan Academy resources are good, but most are too generic - the chance of finding resources which exactly match your requirements, level, or awarding body are quite low.
Will this present a problem to anyone else?