I don’t typically just link to other people’s stuff in a post. But this PDF that Rob Tweed did is a must read:
“MUMPS has a pearl in its oyster called Global Persistent Variables. These are an abstraction of the B-tree structures that are normally used by MUMPS to store large volumes of data.”
As for DivConq, my schedule has been busy but I may get a chance to slip out the next release in the coming weeks. The project is not forgotten.