In a world where Valve controls 90% of what is running on a device with immutable / containerized images, yeah I think Arch makes a lot more sense. A distro focused on rolling release is a lot less likely to hang you up when you choose to update.

Debian is great, but depending on where you are in the release cycle it can be a pain in the ass to stay up to date and, frankly, the last time I ran it, shit like apt/dpkg configuration and so many /etc files and structures just felt like mis-features or too complex for their own good.