Board Thread:New Features/@comment-3513410-20170828103357/@comment-5275700-20170828221236

Some communities do find Achievements valuable in keeping users coming back. We don't have any immediate plan to remove it as long as it keeps functioning as expected, though we won't be developing it any further.

How were you personally opting out of Achievements, other than hiding them on your user page? There is not another option to do something similar, and nothing should have changed due to the removal of the switch for admins.