Software maintenance shouldn't exist. Instead of fighting the source code to map the current trendy environment, we should compile our programs to easily interpretable formats that does not contain any environment specific code and therefore only contain logic specific to the given software.

So instead of having a binary that contain some syscall to access a key state, provide it the function on startup (or the key state value directly if programs become stateless functions)

As for the simple format, this is IMO the only way to guarantee accessibility as the alternative is having people constantly working on porting software over preferably with source access.