I hope that in 2019 Pioneer well come out with a replacement to the 2016 Pioneer Elite SC-LX901, SC-LX801, and SC-LX701. The SC-LX901 is now 3 years old and hopefully a new 2019 flagship A/V receiver well be released as a replacement.
I see Pioneer has released some new entry level and medium level Elite A/V receivers for the year 2019. The Pioneer Elite VSX-LX504, VSX-LX304, and VSX-LX104. The advantage of the VSX-LX504 and VSX-LX304 is that those A/V receivers are IMAX Enhanced certified with a promised future firmware update. However there is no HDMI 2.1 and HDR10+ pass through feature is not mentioned in the specs. The VSX-LX504 and VSX-LX304 are using HDMI 2.0b with HDCP 2.2. Standard HDR10, HLG, and Dolby Vision HDR pass through is offered.
In the ideal world a 2019 flagship Pioneer A/V receiver should offer 13.2 channels, HDMI 2.1 with HDCP 2.3 copy protection, HDR10+ pass through, Auro 3D, HD radio, and IMAX enhanced certification.