The camera doesn't work on the current XPS13 if you upgrade to a 6.X kernel (which, to be fair, means moving outside of Dell's packaging.) Technically this is Intel's fault, as they haven't released firmware for it yet. Still, hopefully the Dell team avoid similar issues in future configs by ensuring better driver support. It's a nice laptop otherwise.
Granted, I’ve still had some random issues with mine, even on the stock version. (The wifi card is glitchy and I have to systemctl restart NetworkManager sometimes, apparently this is a known hardware/firmware issue).