A DAS is more like an external drive where as a NAS is a service reachable on your LAN. Of course, you could use a NAS and plug it straight into your PC for a more DAC-like experience to keep it off your network... It really depends on what you're after.
It ultimately breaks down to these choice dimensions, and there's often overlap which may inform one another (in no particular order):
platform hardware
storage medium(s) (ssd, hdd, layout, caches,....)
filesystem(s)
operating system
shares protocol (Samba, NFS, WebDAV,....)
topology (direct attach or where in your network it's located, vlans and firewalls etc.)
I interpreted 'server' to mean you had platform already which you want to turn into a NAS. If you want storage exclusively for your server, then DAS is fine. If you want to have the storage accessible my multiple devices, then you want a NAS.
It depends on your usecase and what features you're after.
I'm not sure where I got the notion, but ever since Bluetooth became available on my devices I've been disabling it under the impression that it was likely vulnerable (and my last phone kept silently enabling it every so often, which which quite annoying). Since then, a decent number of phone-side exploits of varying severity have come and gone. Now I guess the other devices are the weakest link.... Security probably isn't even much of a consideration when building such a product: "why would someone bother hacking an eatbud?"
I strongly encourage Microsoft to keep making all their products worse while destroying user trust. It's a brilliant strategy that can make the world a better place.
I'd bet the poster has autism....