If you move this into the language itself, the language will grow. It is better to define the language as having the simplest possible API which will still work

If you move this into the language itself, the language will grow. It is better to define the language as having the simplest possible API which will still work. Then build something like supervisors on top of that fabric. Supervisors use the concept of a 'linked process' internally, which is the language-level construct which allows you to build supervisors in the first place. Another construct, the 'monitor' is also worth mentioning. It came later, and supercedes the link in some way.