I think it's mostly related to LICENSE file. For example Redis and now Valkey. Otherwise some eye-catching issue drama on repo.
As long as the license is truely FOSS like GPL v3 then in 99% cases you should be fine.
Out of curiosity, did you also test the Windows port? How good is Valve in Linux porting? I tried CS:GO and CS 2 and CS:GO was problematic, while CS 2 is now better for Linux.
X-plain seems fantastic for hobbyists and enthusiasts! Good to see a Linux port.
Realism You Can Feel
Everything in X-Plane operates from real world physics. Aircraft handling, ground effect, wind gusts, and more will give you the most accurate flight sim experience possible. Try it today!
Detailed World and Atmosphere
As you explore the X-Plane world, the weather, water, light, 3-D forests, and everything around you add to the immersion.
Analyze and Refine Your Flying
There’s no end to the customization you can make to your flight simulator experience. Adjust your approach scenarios, get real-time feedback, and use tools like X-Plane’s replays to study and improve your skills and confidence over time.
Well in Poland we have so many girls named "Julia", so you know...