Pin64.org looks to have been much too optimistic

[Luke]

I expect tillim (Founder) and Luke (Community manager) to give some explications and to show how we can easily get a corrected and easily installable firmware fulfilling the promise given when selling.

And how do you expect us to do it if we cannot write a line of code? We have nothing to do with software, hence: postmarketOS Community Edition. 

Also I stand by what I initially wrote - all the listed features work. Whether they work on your carrier and your OS choice is a whole different story.
I suggest you do some digging on the software status of individual OSes, consider trying out a few different choices, talking to developers directly, etc. and seeing what works out best for you. Have fun.