One way to look at it is ECC has recently become more affordable due to In-Band ECC (IBECC) providing ECC-like functionality for a lot of newer power efficient Intel CPUs.

https://www.phoronix.com/news/Intel-IGEN6-IBECC-Driver

Not every new CPU has it, for example, the Intel N95, N97, N100, N200, i3-N300, and i3-N305 all have it, but the N150 doesn't!

It's kind of disappointing that the low power NAS devices reviewed here, the only one with support for IBECC had a limited BIOS that most likely was missing this option. The ODROID H4 series, CWWK NAS products, AOOSTAR, and various N100 ITX motherboards all support it.