Is this Linux? This article or their website don't use the name Linux or Unix, but they're showing software like Gnome or KDE that are typically used on Linux.
> PureOS leverages the legendary security support from upstream Debian.
Anytime I do a vulnerability scan of a Debian image (updated via apt) using AWS ECR I get a laundry list of open issues including a few high severity CVEs. Meanwhile images based on Amazon Linux, Alpine or Oracle Linux are clear or have only few lower severity CVEs. I haven't looked at AlmaLinux recently but I'll need to soon; if it is anything like CentOS I expect the scan will be fairly clean.
Whatever rationale there might be for this it is difficult to explain to stake holders. In any case 'legendary' seems a stretch comparatively speaking.
They avoid mentioning GNU/Linux in general.