Reply To: New Navigation API
For the moment, it will continue to work (more or less)
Have you read this on 2.6 About page?
https://buddypress.trac.wordpress.org/changeset/10745
…& as example, check comments in this file:
https://buddypress.trac.wordpress.org/browser/trunk/src/bp-core/bp-core-buddybar.php?rev=10745