From what I've heard a lot of Linux users do not trust any Windows based stuff on their systems ...
I think this is true, but not for Linux gamers, since they support/use steam's Proton from what I've seen on the web. So I would go with Proton.
I would love to see this engine developing farther, but it's never going to happen, guys... And this is sad.
The best solution I could think of is ether use acknex as it is OR (better) switch to up-to-date engines.