Single Board Computers - current recommendations

I cannot tell you recommendations about certain mainboards because I have not tested them.
If I recall correctly lkcl from eoma highlights rk3288 and rk3399.

They supposedly have good performance and can run on libre software. If you want certain
graphics functions to work you have to install non free software.

You may also look at armbian's website.
https://www.armbian.com/download/
On the forum I was told armbian software is not about libre software. Regarding
armbian nothing has been done to identify and remove non libre software. I was
told most of the displayed mainboards can start and run on libre software.

I was also told if after installing armbian you run
apt purge iozone3 armbian-firmware
maybe you get a libre software system.

Is the onion omega 2 based on a ESP8266 wifi stack floss? ESP8266 is a wifi microcontroller

The Free Software Foundation has very recently updated its webpage on the topic [0]. It reads "Boards based on the FreeScale i.MX6 platform are almost entirely functional in freedom".

What I do not know is if that also applies to Freescale i.MX6 Dual, Freescale i.MX6 Dual Lite, Freescale i.MX6 Quad and Freescale i.MX6 Solo [1].
Anyone can confirm?

[0] https://www.fsf.org/resources/hw/single-board-computers
[1] https://en.wikipedia.org/wiki/Comparison_of_single-board_computers#CPU,_GPU,_memory