This guy is actually a reasonable and fair reviewer of devices, who just happens to know the Apple ecosystem far better than that of Android. When he's looked at Galaxy phones in the past, he's been very complimentary, and often comments on how he wishes Apple would catch up in many areas. He isn't the most knowledgeable about certain aspects of Android, and sometimes says things that are just plain wrong. But he's not really a sheep.
All that said, he is almost certainly not moving to the Galaxy S10 on a permanent basis. He loves his Apple stuff, is deep into the ecosystem, and makes his living talking about Apple.