Bullshit. Allow an actual user of Windows 10 to correct your statement, since I bet you haven't used it at all: Some things are unfinished. Mostly the consumer facing stuff (think Metro apps).
Other than that, Windows 10 has been rock solid for the past 8 months or so that I've been using it on my main workstation and my main tablet.
Other than that, Windows 10 has been rock solid for the past 8 months or so that I've been using it on my main workstation and my main tablet.