The other thing that was always notable about this letter is Jobs's own use of the term "PCs" to refer generically to a form factor (that would include Macs), and not the long-dead trademark for IBM's product line of home computers from the 1980s.
Prior to the IBM PC, ironically, Steve Jobs had coined the term "personal" computer. Prior to this term, they were called "micro" computers "home brew", "toy", "small", etc.
The idea of one man, one machine. A computer that is personal -- like a toothbrush is personal.
It is irony that IBM used the term on its microcomputer.