On 5 May 2020, at 23:40, Guido van Rossum <guido@python.org> wrote:

Is there some kind of optimized communication possible yet between subinterpreters? (Otherwise I still worry that it's no better than subprocesses -- and it could be worse because when one subinterpreter experiences a hard crash or runs out of memory, all others have to die with it.)

I had already concluded that this would not be useful for the use cases I have at work.
The running out of memory and the hard crash is what would stop me using this in production.

For my day job I work on a service that forks slave processes to handle I/O transactions.
There is a monitor process that manages the total memory of all slaves and shutdown and replaces
slaves when they use too much memory. Typically there are 60 to 100 slaves with a core each to play with.
The service runs 24x365.