Wiki Information Out of Date?

I noticed a few of the wiki tutorial/documentation pages haven't been updated in years. Does the info on these pages still represent the best way to do things and generally best info?

Examples:

• Basic Architecture page: Last updated Sep 2018.
• Build Script page: Last updated Mar 2015.
• Examples page: Last updated Mar 2015 (more recent edits were solely to destroy and recreate the page).
• Java Code page: Last updated Mar 2015.
• Maven page: Almost all relevant info last updated May 2016.

And those March 2015 "updates" were just migrating the pages from Google Code.

If not these pages, are there better places where documentation/tutorials are stored?