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Re:OT and CRDT trade-offs for Real-Time collaboration by DennisP on Monday January 13, 2020 @07:30PM (#22040456)
This article popped up on HN recently and is a great intro to CRDT implementation. It says OT is much more difficult.

http://archagon.net/blog/2018/03/24/data-laced-with-history/

Re:OT and CRDT trade-offs for Real-Time collaboration by spyder81 on Monday January 13, 2020 @09:00PM (#22041109)
That's included in my research links, yes :D