"Fast network performance for the price, but held back by its non-expandable memory."
The 'Quad-Core 1.7GHz CPU' is an efficient ARM processor built for basic file duties, not a desktop-class chip for running multiple demanding applications simultaneously.
This is for a user prioritizing raw network transfer speed for simple backups or serving large files on a strict budget. The value proposition is entirely dependent on having a 2.5GbE-ready network to leverage its key feature.
Anyone wanting to run multiple applications like Plex (with transcoding), Docker, or a home surveillance hub should look elsewhere. The fixed 1GB of RAM creates a hard performance ceiling that ambitious users will hit immediately.