This NAS board is only for the Pi CM4 "Compute Module" - that is aimed at enterprise/embedded solutions, not education like the standard Pi boards.

I think for this, it's absolutely appropriate to compare to other solutions on market. Even the official Pi foundation data sheet describes CM4 as for "deeply embedded applications".

https://datasheets.raspberrypi.org/cm4/cm4-datasheet.pdf

I would also recommend to carefully examine low-cost x86 options, they often do come out ahead given they usually include all the stuff the Pi Foundation don't supply you - a boot volume, case, power supply etc.

I agree, and I think they are phenomenal at that. There isn't anything else that combines the versatility, stability, and cost quite so elegantly for single Pi use cases for education or light desktop use. I use several VLC clients feeding monitors, for example, and they are fantastic.

But I also see things like 10 node clusters with a total of 40GB of RAM, a bunch of slow cores, and materials costs of $500+. That's harder for me to understand, outside of the "looks cool" metric.