I found an 8 bit ISA WD based MFM controller card in my stack of spare parts recently.
Once IDE was established, these two standards pretty much disappeared.
Sort of, IDE is little more than ISA on a different connector. Most of the controller card was shrunk and attached to the drive. The ISA card remained for a while as it still had the bios and the IDE connectors on, but eventually they were incorporated into the PC's motherboard.
Rather than disappear they were assimilated.
