He posted another article here
'Free' Windows 10 Has 3 Massive Unanswered Questions - Forbes
He still thinks you shouldn't upgrade. I am not sure he is correct unless you don't like windows 10. I am little mad about a couple of features that won't work but I am still going to get the final version that comes out on the 29th. It seems it takes longer for the home preview to get an update to a new build, I will possibly be testing it on the 30th. The only reason I wouldn't use 10 now is if my system became incompatible with newer builds or the release. I do expect is Microsoft to release the definition of Life cycle of device is and what happens if the device is no longer supported but still works.