LibreELEC is a great system and if there were a good way to get Steam, Emulation and Minecraft to work with it, it'd be darn near unstoppable. Unfortunately what seems to happen is there is a split--if you want games you can have everything but Steam (and probably Minecraft). If you want media center capabilities it will work wonderfully.
I gave GamerOS a try a bit back and came away very disappointed. The Steam aspects worked very well but there was no good way to access media. The provided docker image and underlying system has no support for mounting of drives on USB or for networked drives. It was more or less useless unless you planned to stream everything from addons.
Worse, it's impossible to dual boot GamerOS because the developer had to get creative and made some kind of 'seamless' update system that completely broke any attempts to dual boot. The first update you would have would break your entire install if you managed to make it work somehow.
Really, all I want is a system where I turn it on and it loads a choice between media playing and gaming. If you choose media playing, it loads Kodi via LibreELEC. If you choose gaming it loads something like Pegasus Front End and you can select from various games installed including Steam games and Emulated titles. It seems like something of that nature should be simple enough but I'm simply not skilled enough to pull it off.
This script was supposed to be the way to have that cake and to be able to eat it too. The more I beat my head against the wall trying to make it work the less and less confident I am that it CAN work. Hell at this point I'd almost imagine that it'd be simpler to start with Ubuntu-Mate, install minimally and then once the core applications are installed start whittling away at things until only what is truly needed was left. Again though this is above my skill level.
I feel cursed at times because I know just enough to get close and to surprise the truly computer illiterate and not smart enough to be able to do things I know the truly computer literate can do with ease. Worse still for me is locally I don't have anyone around to reach out to for help. For most of the people I know I'm their guy to reach out to....
So yeah, I thank you for your help but I think I'm about ready to give up here. Maybe when the original guy posts again on LibreELEC forums I can see if he can make some sense of things. I have linked the thread to here.