Comment by mmis1000

It sounds like what Solaris container did. The kernel responsible for handling kernel abi compatibility. And everything includes the system utilities runs inside a container that got given abi simulated by the kernel.

The model is App -- Static ABI --> [Simulated Kernel ABI by actual kernel] -> Actual kernel.

Everything outside of the specified kernel abi version is not existed to the application.

So it can run as much as years old application as long as the kernel is willing to simulate the abi for it.

And it is also how windows 64 runs win32 app and wsl. There is a api proxy inside the kernel and simulate the api for them.