All of that, and they act as if Linux doesn't even exist.
often used by people in preference to other operating systems due to a variety of reasons
Linux being available free of cost is certainly one of the least relevant features for me.
Dell also sells Ubuntu desktops and laptops that cost more than their Windows equivalents. The cost difference is presumably because the Ubuntu machines do not include the crapware bloat that comes with Windows, such as antivirus trial subscriptions.
Edit: https://github.com/brianlovin/security-checklist/pull/46