I don’t want to downplay or invalidate any of your preferences, but you HEAVILY miss represent the competition. Have you seen a non apple device in the past 5 years?
Other companies make metal body PCs now. From the dinky cheap ass laptop I bought just for fun, to my sister’s proper gaming laptop, there’s plenty of metal+glass laptops out there. And when it comes to android I only really follow Samsung, Sony and Google, but at least those 3 have had metal+glass flagship phones since I care to remember. (looked it up, Sony: 2013, Samsung: 2015, Google: 2018)