It's funny you'd ask that. I just asked VW this yesterday on ifMUD. That
address BTW is
ifmud.port4000.com 4000, or http port 4001 to create a
character. Just a place where a bunch of interactive fiction guys hang out.
Stop by anytime! Anyway, he said that the biggest problem with upgrading I7
is that he might have to fix lots of realms by hand. Guncho, apparently, has
no facility for storing uncompiled realms, nor different parallel versions
of I7. So, if any realm failed to compile under the new version, it would
just disappear. I know that's got to be a big job, and so I understand why
he is a bit reluctant. And I get the feeling that it's sort of a deal where
once you start, you really do need to finish what you started, you can't
just say "Oh that's too much trouble right now" and leave the job partially
done. At least, that's my understanding of the situation.
Jayson