Hey! I read the hole thread, and usually, I use Linux as my main machine. On the Website I found Orion for Linux and I thought a perfect let's test it. I would love to help to port the codebase to Linux.
At the end of the day, it's none of my Business, but the more and longer I work on my machines, the more I transit to open-source software. Occasionally, I like to patch small things and so on.
Sadly, this thread i over 2 years old and my conclusion of this would be nothing will change if your team don't want to.
If you guys still want to go open source please now is the time. If not, inform your users.
Thanks for reading and thinking about it.