Whether it goes into R7RS-large or not and how, a future vote will
show. (In the Red edition, (scheme generator) was SRFI 121; in the
current edition, it is SRFI 158.
True, but that was an entirely backward compatible change, or if not it was by accident that it was not. This change would be the very reverse of backward compatible, and as chair I cannot allow it. Adding a library file to your favorite Scheme that imports the old names and exports the new would be a simple matter.
What do you mean by that one or more new SRFIs will be required for
streams and lazy lists?
I meant to say that it now looks unlikely that *random* streams and lazy lists would appear in 194, unless someone has time at present to implement them. And if so, I would prefer (though I cannot insist) that that time be expended on another of the Orange Edition pre-SRFIs.