The Turris Omnia router: help for the IoT mess?

Btw. I am also a proud owner of the Turris Omnia (2 GB RAM) Version from the first batch. The initial setup was a bit flaky then in a similar fashion. I never noticed the connectors to be loose or anything. I can confirm, that the generic fs.com single mode 1 Gb transceiver works perfectly well with the Omnia.
I am also able to confirm, that in Germany, the combination with DrayTek Vigor 130 as a VDSL2 bridge on Deutsche Telekom subscriber line is without problems since day 1. The Omnia understands the PPP and can be setup from the less experienced user interface. I used this post as a reference: https://www.bjoerns-techblog.de/2017/07/draytek-vigor-130...

The new Aruba 8400 and 8320 Switches seem to be entirely Linux based but if you do anything in the shell, you will probably lose the warranty. At least that is what I hear from somebody, who is selling and installing them. By the way, if buying anything else form HPE/ Aruba in the switching realm today, I would seriously ask, whether it will not be superseded by new models in 2019.