The history of supercomputers
extremetech.com
extremetech.com
The iAPX 432 was an earlier Intel miss. Much ballyhooed in the trade press for a couple of years. Supposed to run Ada programs efficiently, or something.
(Just noticed that lowercase 'i' there - in the 1980s, it meant an Intel chip, most famously the i8086.)
Also, the CDC 6600 probably deserves whatever press it gets. Though I think IBM sold a lot more 360s.