To be fair, all computing business from the 1980's was vertical integration, the exception being CP/M, the university folks porting the UNIX tapes into their vertical integrated mainframes, and Compaq getting lucky on how they reverse engineered IBM PC's.
CP/M systems eventually died, UNIX startups created by some of those university folks were just as vertically integrated as the mainframes they replaced, leaving only the PC clones.
Had Compaq not gotten lucky, and today's computing landscape would look much different, probably like the laptops and all-in-one PCs that are being pushed nowadays as the OEM margins cannot get any thinner.
CP/M systems eventually died, UNIX startups created by some of those university folks were just as vertically integrated as the mainframes they replaced, leaving only the PC clones.
Had Compaq not gotten lucky, and today's computing landscape would look much different, probably like the laptops and all-in-one PCs that are being pushed nowadays as the OEM margins cannot get any thinner.