I've switched to a Pixelbook and like it for many tasks. The Pixelbook is lighter and has a taller 3:2 screen, both positives. The Chrome OS security model seems stronger than Ubuntu out of the box. My development environment now runs in the safety of a VM.
I had the XPS 13 9333 and later replaced it with the XPS 13 9730. It's about a year old now and is currently back with Dell to repair two USB-C ports that stopped working about the same time-- around the time I got the Pixelbook.
The Crostini software and integration on the Pixelbook still needs polish, but overall I'm happy with the Pixelbook as an XPS 13 alternative for a Linux development environment.
I hope that Pixelbook 2 will be released soon with smaller bezels and more up-to-date hardware. Then switching from a Thinkpad running Fedora / Ubuntu to a Pixelbook will be a no-brainer to me. I think that ChromeOS is the most secure OS at the moment, and a Pixelbook is like an iPad Pro and a Macbook Air combined. Which is exactly what I want for work and leisure.
I had the XPS 13 9333 and later replaced it with the XPS 13 9730. It's about a year old now and is currently back with Dell to repair two USB-C ports that stopped working about the same time-- around the time I got the Pixelbook.
The Crostini software and integration on the Pixelbook still needs polish, but overall I'm happy with the Pixelbook as an XPS 13 alternative for a Linux development environment.