::::: "Indisputable"? I'm sorry but WP does not recognize your or any editor as having the power to declare a matter under dispute as "indisputable." I'm disputing it, based on considerable experience with PCs sold as complete PCs. I'm talking in particular about the models that are installed on the high tens of millions of corporate desktops in the US alone. PS/2 ports are like hen's teeth in that environment and these machines vastly outsell motherboards sold as components or high-end PCs sold to gamers. 

 Re. consensus, it is most decidedly not a "numbers game." WP:CONSENSUS is not based on voting, but on logical arguments: 
Consensus is determined by the quality of the arguments given on the various sides of an issue, as viewed through the lens of Wikipedia policy.

 See also WP:NOTDEMOCRACY: 

Wikipedia is not an experiment in democracy or any other political system. Its primary (though not exclusive) means of decision making and conflict resolution is editing and discussion leading to consensus—not voting.

 And as for consensus vs. policies, see again WP:CONSENSUS:

Consensus among a limited group of editors, at one place and time, cannot override community consensus on a wider scale. For instance, unless they can convince the broader community that such action is right, participants in a WikiProject cannot decide that some generally accepted policy or guideline does not apply to articles within its scope.

 In short: Nobody has presented a RS for your claim, so it doesn't matter how many people agree with you. So far your argument has consisted of a survey of specialty products from one online vendor, followed by numerous instances of "argument by vigorous assertion." WP:RS requires more than that.