For a glimpse of the future if course is not changed, take a look at ABC/Disney, where the whole org has bought into partisanship so much that they are now tearing the whole company apart trying to find a the person responsible for leaking the video talking about their Epstein cover up.
> The source added ABC investigators have been rifling through staff emails, news logs and grilling staffers. The company has been isolating certain employees and putting them under pressure to turn on their colleagues in a bid to find the culprit, the source also claimed, adding the investigation reports back up to the very highest levels at HR at ABC’s parent company Disney.
https://pagesix.com/2019/11/12/abc-scrambles-to-figure-out-i...
So Google+'s IP could have been very valuable
Basically thinking "Don't do evil" and being a profitable competitive corporation are compatible.
My guess is that the increased closing off of various documents is to do with the increased amount of confidential partner-related information as Google scales its cloud business.
But, as is often the case with Google, much of the disillusionment here seems to be due to unrealistic expectations and nostalgia. There have always been secretive projects at Google. Chrome was super-secret; you needed special authorization to get into the Google+ area; you needed special authorization to get into areas where new Android hardware was being worked with; you needed special authorization to get into the X area; etc.