I have the original one pre ordered, orange cover and all. It was my first smartphone. Used it for years. Then things started to become slower (more apps using more resources / being heavier) and my needs changed (wanted better camera, more space, 5g, need to use android apps that required a higher api version) and bought my second smartphone which was an android.

So the phone really is linux, had systemd / journalctl if I’m remembering right, file system was btrfs which I had to do some maintenance by hand by ssh into it, it was using wayland. Basically 2 things were closed source: their UI and the thing that allowed to run android apps emulated.

I absolutely loved it and the ux was very nice. It took me a lot of time to get used to modern UX of android after it and it was painful to adjust.