@dave_b
Do you remember the title of this thread? Atmos is new, your "rails" are intact. Dude, if you are so enamored with "old" I got no beef with that. Bitter after tossing all that cash into something so lifeless that the only thing they seem to play at audio shows on those $$$$$ systems is female vocals and acoustic instruments, I get it. The poor engineer doing the mix was forced to shoe horn it in to the two channels, hence you have an army of zombies, butt glued in the MLP, head in a vice with two sound cannons pointed at their head, yay for the old, I get it. Here is a link to a plethora of award winning engineers extolling how much they love having a broader palate to mix with in atmos then stereo. Does atmos have a complex setup? Yes, but the dolby standards are clear, it is backward compatible with whatever you have, and you can even use headphones:
https://www.soundonsound.com/series/mixing-atmos-top-engineers-producers-provide-insights-immersive-audio