Parity with Bedrock Addons.

Minecraft Java Edition has been through the flattening, and in that process the formats of the texture and data packs were changed. Bedrock Edition still uses a very similar pack format to what Java had before the flattening.

This was easy to change back when it did, since Java Edition has a launcher, which players could have played an older version of the game if they wanted to use their old packs. Now when it comes to doing this with Bedrock Edition, it seems near impossible. See, there's many more players now than there used to be, and also you can't downgrade Bedrock Edition. Wait.

In every resource and behavior pack, there is a manifest.json file. All that would need to be done to this, would be adding one line to it. This could be something like:

{
  "pack_format": 1.22,
  "format_version": 2,
  "header {
...

Now, you're probably wondering how this would work on existing packs that don't have this line. Well, the game could either see that the line is there, and use the value from that, but, if the game sees that there is no line that states "pack_format", the game would assume and choose the original format rather than the new one.

After this change is introduced, there can be easier transfer of popular packs that exist on Java Edition to Bedrock.