A lack of education on a certain accent and/or look might also trigger honest curiosity in people, as opposed to racism. But I guess the way people ask you background questions reveal their agenda.

Provide out-of-box ease of use on everyday devices operated by low-skilled users.

I mean, Linux technically could, but the incentive to push for this is not nearly as high as the commercial incentives of providing this experience using Windows. So unfortunately it currently can’t.

Hard to answer. I guess there is none.

Most Japanese people have dry earwax: http://drypharmacist.com/types-of-earwax.html

Obviously this is cleaned differently compared to wet earwax.