MM> ml> mystic supports only the JAM message base, AFAIK... squish was removed
 MM> 
 MM> What makes Squish not as viable in the bbs world?

Squish has some limitations when it comes to things like reply linking. Some
may consider JAM more flexible because of the way it stores
"sub-data" about
the messages rather than having a static message header.

JAM is also more widely supported than Squish in 3rd party utilities.

In the case of Mystic, it was removed simply because no one was using it.

--- Mystic BBS v1.12 A34 (Windows/32)