Microsoft has MSDN their online document resources and they have been there for many years. But, in 2016, Microsoft released a new document platform which is docs.microsoft.com, the at that time the new document website was still preview version.
Microsoft Connect(); 2017 sessions available at Channel 9
Here is the link
I want to guess when is the next release date about one of Microsoft products, so I might have a good way to search Microsoft product release lifecycle.
I found Microsoft provide a related web page, though it is not exact what I wanted, but you can get help information if you just want to “guess” the release date.