You really seem to forget the horrible ISO performance, really horrible, looking like a handycam above 1600.
Lenses for low light? Sure get the premium S lenses, used, and you can just trash them after you decide to switch system.
Need more low light? Sure buy the adapter for the price of a low end panasonic mirrorless, again that you will trash since it can't be used in the future.
It was an amazing product no doubt, anyway let's not forget about its flaws for low light when others were way better already. And fixing those issue by giving away for money for a DEAD system is not something I would advise or feel good about it, honestly.
However if the NX2 was real........