They are going to get absolutely smoked upmarket. There's so much competition that has basically no downside comparitively.

And probably in that niche too, once people realize how cheap used hardware really is.

Orico has a 4/5 slot USB3-10gbps DAS box, which can daisy chain up to three boxes.

Get 6 boxes, daisy chain them as 2x3, connect to a powerful-ish NUC box. Install TrueNAS on it. Use the SATA port for the OS, leave the NVMe slot alone, add a 2-4 TB good SSD.

Set the SSD as a cache to that 30 disk zRAID2 or zRAID3 pool. You can have a kick-ass enthusiast level NAS box which will beat many Synology boxes with a big clue bat...