512 MB of RAM is low, even for a board intended as a router/gateway.
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Is that all you think memory is for? What if somebody wants to run an MITM or DNS-based content blocker for LAN clients? I can imagine loading URL blocklists into RAM for efficient evaluation taking more than the 16-24MB RAM available in the scenario you're talking about, for instance. Or what if somebody wants to fire up a NAS with an old spinning disk and use RAM for write caching?
Then this hardware is not for you. Not everything has to line up with your expectations. Plus this thing is like $35, what do you expect? There are other capable systems like the solidrun honeycomb.
What's with the hostility in this thread?