For basic SMB shares, technically, maybe. A Linux box with a few drives can share files over the network perfectly well. But most modern NAS users want more than one folder share. They want snapshots, backup jobs, mobile photo upload, user permissions, remote access, media serving, container apps, cloud sync, surveillance, notifications, two-factor authentication, replacement-drive workflows and a clean interface. Repurposing an old PC as a NAS is useful, but not free of trade-offs. You can build all of that yourself. The question is whether you want to. For some users, learning Linux storag