The example I presented was to show how a one supplier fits all solution in computers is the worst thing that can happen.
As to your iPhone example it's more like avoiding an iPhone because the phone is not yours even when you purchase it. You require Apple's approval in order to use it. Your require the carriers permission to change sims. You are not permitted to remove certain software. Your purchased phone is not yours to do with as you please.
Apple was in the lead in the personal computers with the Apple ][ and Apple ][e and lost the market because it wanted to control every aspect of the hardware. IBM published the schematics of its first PC and shipped it with the system. It created the diversity that we see today in computers because it opened the doors to all to innovate. HP, Dell and Gateway were clones.
Now I am not advocating another solution I'm just pointing out that you can't own an iPhone. I am also pointing out that Apple was once before the dominant player. Apple almost disappeared from the marketplace. Apple is no longer the dominant player in phones and it's following a similar path as it did with the PC. I am not saying Apple is going to disappear tomorrow but there are better solutions today than the iPhone and it has nothing to do with the floppy drive.