The article is here. Quoth (any emphasis mine):
Making huge forced changes to a platform is problematic for people whose livelihood depends on certain things being a certain way. I would not recommend making YouTube or Google+ a large part of your business, and these changes should be scaring away anyone who was considering investing in the platform.
Google’s products used to augment humanity with beautiful tools that helped us get the information we wanted to see. That was the superiority of Google search, Google reader, gmail with its excellent spam filter, and YouTube, which allowed you to subscribe to any individual who might want to post videos.
Making things people want is good business. Tricking people into using things they don’t want with a bait-and-switch is not good business.
I think these changes are going to make a lot of popular YouTube videomakers looks for an alternative platform — which is to say now seems like a great time to start that service.
Can you imagine the video functionality of YouTube with a comment presentation more like, say, Reddit?