http://dtyzgbrlozogokiaidoaszcutfiwduzswxdghkd2snonicbux2xudkqd.onion/faq
By contrast,
proprietary, commercial operating systems like Windows and macOS tend to either
obscure this fact or avoid using upstream software in favor of doing everything
in-house, because they have the huge workforce and commercial revenue that
allows them to do so. If you’re accustomed to using a proprietary, commercial
operating system, then you may need some time to get used to the fact that
Qubes OS is a compilation of many different pieces of open-source software.