This isn't very actionable advice, though, since there is basically no such thing as a software product that isn't built on somebody else's property.
You might think, "Ah-ha, web apps!" But no, Google can still casually destroy you there. Or you might think, "Ah-ha, desktop apps!" But the OS vendor can casually destroy you there.
You might think, "Ah-ha, web apps!" But no, Google can still casually destroy you there. Or you might think, "Ah-ha, desktop apps!" But the OS vendor can casually destroy you there.