An opinion on the future of OMEMO:
http://blogs.fsfe.org/vanitasvitae/2018/09/07/future-of-omemo/
– some users/developers consider forward secrecy needless
– OMEMO's trust management sucks
– OMEMO only protects the message body
– OMEMO isn't a standard and further development came to a standstill
– Messaging Layer Security (MLS) is an upcoming attempt to create a new encryption standard