We received notice from Google Play that they are going to start requiring 64-bit support. Normally, this wouldn't be a big issue, however doing this will require us to change how we build SimplePlanes for Android and we will need to change the scripting backend from Mono (which allows mod support) and move to IL2CPP (which does not allow mod support). Unfortunately, this means the Google Play version will no longer be able to support mods.
I just wanted to let you know so this didn't come out of the blue with the next update. Sorry for the bad news. However, the bright side is that the Android version will likely see performance improvements because of this. iOS has been built for 64-bit with IL2CPP for some time, so it won't see any additional performance gains. The macOS and Windows versions won't change and will continue to have mod support (except on the Mac App Store, where mod support is prohibited by Apple's TOS).