What is Reference Recordings up to this time? This is 5 years old and on CD only

​This is a CD-only release. Why? Are they going to issue this on multi-channel SACD at some time in the future, after many of us have already purchased the CD? They've done this before; therefore I'm REALLY hesitant to buy this. 

It's also interesting to learn this was recorded in 2016. And is just now seeing the light of day.

Many of RR's recent issues have been abysmal as recordings. However, their Kansas City SACDs have been pretty good. So why has this one been lying in obscurity for so long? And why, after the wait, is it CD only? Reference Recordings is up to their old tricks again, me thinks. And I'm not getting suckered into it this time.