I saw a similar proposal (I think with JavaScript/node) not too long ago that deacribed limiting packages to data in their own namespace. For instance third-par

I saw a similar proposal (I think with JavaScript/node) not too long ago that deacribed limiting packages to data in their own namespace. For instance third-party-dep-a would only have access to data it created or was passed in versus indiscriminately accessing anything in the language VM. Even this would be a good step in the right direction although you'd likely still need something like you e described for accessing shared system resources (aka the mobile phone security model)