I have tested Qubes 3.2 on my new X1 Carbon laptop, and things mostly worked out of the box.
I was able to boot and install Qubes OS from USB via legacy boot mode.
I have 128G NVMe drive that came with the machine. It seems to work fine as far as I can tell.
Sound/WIFI/SD Card/USB works out of the box.
The only issue I noticed is suspend mode seems to NOT work with VT-D enabled.