"A competitively priced 4-bay NAS whose hardware specs outshine its unproven software."
The '128TB Massive Capacity' claim is theoretical, based on future 32TB hard drives that don't exist yet. With currently available drives, the real-world maximum capacity for this four-bay unit is 88TB.
This is a strong value for a technically-inclined user prioritizing hardware-for-the-dollar. If you want a capable Intel CPU, 2.5GbE networking, and 4 bays for a low price and are comfortable with a new OS and using Docker, the hardware specs are compelling.
Anyone who needs a polished, reliable software experience with a long track record of security updates should pay the premium for an established brand like Synology. The lack of virtual machine support and the uncertainty of a new OS make it a poor choice for critical data or business use.