I have exactly 1 DVD-A disc.
I listen in 2 channel mode. I believe most players (by default) will play just in stereo if the "surround" outputs are not plugged in.
There may also be something in the settings where you can choose 2 channel vs surround.
Honestly, the DVD-A's I've seen are all exorbitantly expensive. Like twice the price of the identical SACD, so I never really bothered. $15 for the CD, $40 for the SACD and $75 for DVD-A.
I'll stick with SACD, thanks.