What GNU/Linux mobile? Can you elaborate on that?
>> I develop software for SailfishOS. It's like the Linux desktop. I SSH into my phone. zypper/pkcon install some dev tools (e.g. gcc, make, git). I initialise a Python virtualenv, pull down some libraries (e.g. Flask). I want to query SMS messages? I open an sqlite database on the filesystem. I can define services using systemd files. It really is "just Linux" underneath.
In any case, thank you for your efforts. I've been waiting for UbuntuOS for all the features I didn't know Sailfish has already.