I'm looking for an explanation of the
vendor/[vendor] directories? (For M2.1)
Some online sources (such as inchoo) say to put a new module in
app/code/[vendor], yet in 2.1 there is no such directory, and modules are conspicuously in
vendor/[vendor]. Meanwhile the official doc page on the Magento file system say "information will be added later".
Which is correct? What's the history -- did this change at some point? Can I read docs that refer to
app/code and just do the same thing in