Fanless is attractive on paper, but often means overheating and unreliable in practice. A large, slow fan in a bigger case is always better if you value reliability and a long service life. The best 10G router that you can buy is a low spec PC with a two-port 10G NIC. Make sure airflow is directed to the NIC (a PCI fan bracket is useful for that). WiFi is best handled by a dedicated access point, ideally the ceiling-mounted commercial type.
replyIn my stress tests, I've not seen any issues with overheating. My 10G ONU connects to the router over an ethernet cable, and the SFP+ module that plugs into does get quite warm, though not hot enough to be uncomfortable.
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