although it probably doesn't matter for bicycle component applications -
don't mix lithium and molybdenum greases
"Moly" greases frequently
are lithium soap-based greases. I would say just avoid moly grease on a bicycle altogether unless it's specified. I can't think of anywhere it would be needed.
Check your sources. The official FAA accident report 1.) is newer than the linked news articles and 2.) concluded this:
Alaska Airlines’ use of Aeroshell 33 for lubrication of the jackscrew assembly, acme
screw thread surface finish, foreign debris, and abnormal loading of the acme nut
threads were not factors in the excessive wear of the accident acme nut threads.