What to use instead if one cares about privacy and security (what I call personal sovereignty)? It's a non-rhetorical question.
That alternative presumably has better security, but also generally worse usability (particularly if you're going to be mobile! -- two laptops in your bag might be acceptable but comparable isolation would require more than two).
Not necessarily: https://www.qubes-os.org/faq/#how-does-qubes-os-compare-to-u...