when ubuntu has the most users and many are familiar with it.
agree with you, but for another reason:
Lubuntu is just a variant of Ubuntu, it is the same OS, which uses LXDE desktop instead of Uniti Desktop in Ubuntu, and for mining purpose I don't think there will be noticeable difference
nvOc has been tested with ubuntu and working great and we all agree on "If its working, don't fix it"
Changing distro just for desktop environment is a waste of time, anyone can change to lxde (lubuntu-desktop) or any other desktops with some simple commands.
sudo apt install lubuntu-desktop
log out, choose lxde, log in.
As NameTaken mentioned a good point, most closed source miners are compiled for Ubuntu and moving to another distro even Lubuntu may cause problems in the long run.
Closed source miners are compiled for Ubuntu and running them in Arch will result in miss and/or wrong shared libraries.
nvOC slogan is "nvOC easy-to-use Linux" Linux gurus can play around and do whatever they like, and most of us do, it's the newbies and windows users we should be worried about.
Users got used to nvOC commands, desktop environment, ... let's not confuse them.
As I told Leenoox before, I'm willing to work with any one who wants to work on building a new branch of nvOC for more advance linux users on any other distro.
I don't think Lubuntu would cause any incompatibility problems as system libraries underneath is still Ubuntu but I know using Arch or even Debian will.