Does any Dell employee lurking have info about why I should consider waiting for the developers edition rather than just load up my favorite distro on the consumer hardware?
For example, the WiFi and Bluetooth support in dev edition XPS13 is solid.
You’re also paying for OEM firmware updates. I've had several over the life of my XPS13 even though it’s no longer the current model.
If one does not want to install a distro, then this might be a reason to wait for pre-installed Ubuntu. But the parent is happy to install their own distro, and so is asking for an additional reason, relevant to them, to wait for the dev version.
However, on dell's website it is cheaper than the "normal" edition.