Why doesn't puri.sm even include an Ethernet port in their premium product Librem 15 and in Librem 11 (though they do in Librem 13); cf. https://puri.sm/store/. There are very good reasons to use ethernet and strongly avoid use of WiFi if you are serious about privacy. For example consider slides 69-76 of http://de.slideshare.net/grugq/opsec-for-hackers, where the FBI could see when there was data sent/received by simply looking at when there was activity in the suspect's private WLAN (something that is not possible in this form for ethernet) and decorrelate it to his TOR activity.