Loren C. Wilson

Note that villagers disappeared as well. The explanation offered only covered items that don't exist in 1.16.5. Villagers do so why did they disappear?

Since these are fundamentally incompatible versions, please change the launch program to not offer to upgrade to a version of 1.16 when the snapshot is a 1.17 version.  I also lost all my trading villagers.  As these exist in both versions, your explanation of why they disappeared does not apply.  I also lost all my path blocks but this is a very minor issue as compared to losing 20 librarians that trade you all the useful enchanted books for 1-2 emeralds.