So your basis for the "very few people" is Apple's inaction?

They're really the only entity who knows how widespread this is, and is financially incentivized to address it. Additionally, my employer has probably 30,000 of these keyboards in service and it's not a significant issue.

They're also financially incentivised to downplay the issue considering the class-action lawsuits alleging that they were selling defective keyboards.

I don't think Apple is too concerned about class action lawsuits over keyboards... They'll settle and pay a little cash, another entirely insignificant number.