@p @scathach @jeffcliff @Suiseiseki There's no reason not to have a standard system ABI and/or an environment for hosting programs atop of that permits for abstracting those concerns.

This doesn't require strongly coupling programs. They can remain separate, and written in separate languages. All that is required is a compiler adequate for the target environment and/or some abstraction interface library to interface with said ABI or environment properly & transparently.

Whether structured messages can be passed directly or require ABI interpretation shouldn't be the programs' concern beyond that.