Last I heard it was still being targeted for 9.1**, but it wouldn't suprise me at all of this got pushed back to 10*. There's some really interesting papers you can find that speak in detail about the additional issues with TLS 1.3 and attempting to intercept that communication in a passive format.
*version names referenced are simply picked from historical release information.
**Inside Baseball (IE: Roadmap) discussions are strictly confidential and enforced through an NDA. The information presented in this post is non-official information and was not directly supplied by Palo Alto Networks or its employees.
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