And so would I. X1 has been my workhorse for the past 5 years or so. If the native Linux GPU drivers work well, I'd upgrade to a Radeon APU based X1 Carbon. I don't even care if it's expensive.
My next laptop will be a Zen 2, regardless of whether or not Dell steps up to the plate. I hope they do. I prefer the fit and finish of my current XPS13 to my previous X230. Also the XPS 13 developer edition ships with Linux, which I approve of.
But the an AMD X1 would be awesome indeed. The better chassis and 4K screen would make it the ideal machine for me. I'd love it if they did that in the Gen 8 but I'm not holding my breath...