This one is a sore point with me as I made several decisions soon after Logos 4 was released based upon the "promise" that this would be coming as part of Logos 4. I have seen very explanations for its delay/cancellation:
- technical issues
- concerns that PB's are not primarily personal works
- . . .
I had intended to use it as a means of sharing out of print hymnals and personal lectionary based Bible study materials. I don't know how others would use it but I am unhappy that I made poor decisions based on what turned out to be bad information from Logos/Faithlife.
Everyone may have given up and found other approaches ... so I don't know the appropriate priority.