There’d need to be some fairly heavy regulation in place to keep the separate vendors from collaborating/colluding. Intel and Microsoft were perfectly happy to

There’d need to be some fairly heavy regulation in place to keep the separate vendors from collaborating/colluding. Intel and Microsoft were perfectly happy to keep their shared customer base on a rapid, predictable upgrade path for about two decades. Granted, of course, the upgrades were _attractive_ so long as Moore’s Law held out.