Can any one help me out with latest notes on  "What's Not available in Lightning" in detail . The last I can find is the below link https://releasenotes.docs.salesforce.com/en-us/winter16/release-notes/lex_gaps_limitations.htm from Winter 16 with each features. 

Even winter 18 doesnt contain any such detailed possible gaps. Any idea , how frequent does Salesforce update the details.