Teambomba's DOS Moonwave driver
my best guess is, MSD created the drive .. So, chime in, fella.
My knowledge of memman is super little, but I could imagen it is a true memory manager where the DOS one is just mapper segment managing. On other words, MM prolly does small blocks, DOS2 does 16K blocks only. You can imagen, I'm not a fan of the DOS2 shizl. So, I'd say (*If my assumption about MM is right), the advantage of MM is that it manages memory as a whole instead of segments (memory parts) like DOS2. From a programmers point of view, that's a huge difference.
The TSR (Terminate, Stay Resident) seems like a nice thing, tho your application has to be aware of this mechanism. A good TSR program has the ability to resume where it left of. In true fashion, TSR stays dormant in the background until called again. So, it's not active like a multi threading system can do where apps stay active and keep on "running". A TSR pauses and resumes when exiting/entering. Dunno how MM handles this, tho 
