Hi Paul
Apologies for missing your questions
1 Are learning plans still available in V16? yes they are still available in 16 and 17
2. Can you assign learning plans with sets of courses pre-populated to individuals and audiences as well as through positions and orgs?
This can be done indirectly by creating a competency with linked course and setting automatic assignment and include linked courses.
You would also need to auto-create learning plans through audiences
regards