Micro-channel Architecture. Didn't take off because it was IBM's property and nobody else would license it, they preferred to skip it and use ISA and EISA and VESA Local Bus then PCI.
I never even HEARD of Super IDE before this. Looking it up, it seems like it's not really anything special, but is actually a single card with controllers for everything, parallel, serial, IDE, floppy, game port. One even looked like it had audio jacks but that wasn't mentioned in the specs. They seem to have been used on the VESA Local Bus as well as 16-bit ISA. I'd guess back then it was still an issue for computers coming with only one IDE port integrated. They also seem to be meant to upgrade much older computers to support EIDE or UltraATA, faster serial and parallel ports, LS120 drives, et cetera, because many list Win98 support.
Wow, even found an 8-bit card from SIIG.