Halium is interesting because it comes with the potential of building a pmOS Generic System Image (GSI). While this would be relying on vendor-shipped proprietary drivers and kernels, literally everything else could be Free and run on mostly any GSI-supported device with a full feature set.

Yep! My personal issue with Halium is the fact that now you have devices running around today running something like Linux 3.10, which I shutter at because of security concerns.

shudder*

postmarketOS definitely doesn't ship halium, we're more focussed into doing proper Linux development

Whoops, my mistake! Unfortunately I cannot edit my comment to reflect that.

So then out of curiosity, how are you all able to port to so many devices? Do you have a bunch of volunteers, or all most of the devices not too difficult to port to pmOS?

So a few of the pmOS folks were kind enough to discuss the pmOS structure with me, so I will try to summerize here:

pmOS has really good tooling called pmbootstrap. They are able to use the downstream kernels directly (or a mainline kernel if the device supports it), and it generally isn't too difficult to get pmOS to boot with the downstream kernel. However, because of the downstream kernel, you may not get a lot of features, and will have to work to port the features to pmOS.

They also have device catagories, so if someone wants to see the status of a device, they can look here: https://wiki.postmarketos.org/wiki/Devices which bins the devices for a user to quickly understand how well a device runs pmOS.

Thanks! Now I know what device I need to buy to test it.

We welcome users, testers, and new developers! I actually started development with Mobian earlier this year. I personally would recommend getting a Pinephone for it.

As MartijnBraam pointed out, pmOS doesn't ship with Halium, so that is my mistake