https://notenoughtech.com/news/argon40-brings-nas-to-masses-argon-eon/
$130 and you get get a SLEEK looking case, OLED mini-screen and space for a Raspberry Pi 4 [gigabit ethernet...] and 4 SATA-driven HDDs! [2x3.5",2x2.5" 
or 4x2.5"] You can even throw in SSDs if you want the best possible throughput. 
Supports up to 10TB drives, and you can run a RAID since they aren't USB  drives... we're getting close to 'enterprise' here.
What would I have preferred? An option/version that used the Raspberry Pi CM4  module and a custom-PCB with PCI for faster HDD read/write. If that were ever a 
possibility, I think a Pi 4 8GB model [CM4] would give the big guys a real run  for their money. These SBCs aren't wimpy, and Argon is already widdling down  the bottleneck this the EON... just one step to go, IMO.
If you are wanting a setup like this, and don't mind not having a beautiful  case like this, one could choose the Odriod SBC that does have PCI support...  but a case by the pros @ Argon is a real treat. They've proven to be high  quality with ANY of their Argon cases.
Do you think this is a cool looking product for entry NAS needs? I 100% do.
|07p|15AULIE|1142|07o
|08.........
--- Mystic BBS v1.12 A47 2021/08/29 (Raspberry Pi/32)
 * Origin: 2o fOr beeRS bbs>>>20ForBeers.com:1337 (1337:3/129)