Apparently early IBM SCSI cards used a proprietary 60-to-50-pin adapter cable on their external connector. It's apparently the same connector IBM UNIX machines like the PC RT and RS/6000 used. Which is annoying, but in all fairness Apple's 25 pin DIN connector was not only proprietary (until other manufacturers copied it) but was electrically bad.
In context the "Reference Disk" system made perfect sense. The Microchannel bus system allowed far more latitude for reconfiguring the layout of the system than PC AT clones did. (Or Nubus, for that matter. There were, for instance, RAM cards for the 80286 models that could remap or completely disable memory on the Planer in order to add an LIM/EMS 4.0 MMU.) Microchannel bus cards all came with a floppy that described what system resource changes they needed to function, and that data would be read by the setup program which would arbitrate resource requests from all the cards and come up with a working configuration to stuff into the nonvolatile RAM and allow said configuration to "just work" at boot time without having to re-detect everything. (In addition, the resource files for the individual cards would be copied to the main Reference disk so you wouldn't need to keep track of all the individual ones. Should the nonvolatile RAM contents be lost you could just boot the one disk and set the system back the way it was in pretty much one step.)
It certainly would of been possible to put the entire setup program in ROM and read the configuration databases off of ROMs in the installed cards, but IBM's system had some advantages, namely being cheaper and *potentially* more flexible. (For instance, Flash memory didn't really exist yet at the time, so using the Reference Disk system essentially allowed "BIOS updates" to recognize new hardware to happen without swapping chips.)
Eh, anyway. It seems stupid now, I guess, but we're also terribly spoiled by a quarter century of evolution.
It's actually 43.5Hz. (I know, nitpicky.) It's a "standard" resolution in the sense that it was moderately widespread back in the day, but... yeah, I haven't used a system that was only capable of that *forever* so I honestly have no idea how common support for it is in LCDs. Any Multisync CRT monitor shouldn't have a problem with it, though.