I am one of those "old school people" who like physical media and own well over 700 CDs and another 100 or so SACDs and DVD Audio.
Welcome to the "in the know" Club

I took all my original SACD & DVD-Audios and made images out of them. Coupled with all the great redbook upconverts from "Holland" & others, I've built up quite a collection of both. My all-analog system is
specifically designed to play those 5-channel recordings...the best of which I still think sound as good as any Atmos version.
I still can't believe they died an early death... at one time @ Best buy they were both priced the same as a CD ($14.99--I remember vividly), and in the case of most SACDs there was even a regular CD layer that could be played!