I haven't misunderstood it (I don't think). B*-tree is basically a hack to store extended attributes that weren't initially included in HFS. APFS includes those

I haven't misunderstood it (I don't think). B*-tree is basically a hack to store extended attributes that weren't initially included in HFS. APFS includes those extended attributes natively. I'm just wondering if the difference in how they're stored is the reason for the loss.