Update 1.21-notes.md

doc/1.21-notes.md

@@ -18,9 +18,11 @@
   * 1.21 (enchantments, data pack paths, rendering): https://fabricmc.net/2024/05/31/121.html
 
 ### Technical/internal changes
+* Remove all random bits of legacy data support code; if we want to support world upgrades from pre-1.20.5 (which seems unlikely), we are going to need data fixer logic, which could also take care of legacy block entity properties, etc.
 * Add MixinExtras dependency to allow for less hacky feature/fix implementations, e.g.:
   * zoom for Botania bows
   * apothecary filling via dripstone
+* Use Fabric Mixin instead of the SpongePowered version in Xplat module to take full advantage of both Fabric and NeoForge shipping with that fork
 * Use convention tags v2, since Fabric and NeoForge unified their tag systems
   * ensure existing resources are tagged properly (e.g. manasteel ingots as `#c:ingots/manasteel`)
   * remove platform-specific tags (except for mod compatibility where we know they stay on only one of the loaders)
@@ -54,9 +56,11 @@
   * Figure out if there's an alternative to the variant enum and massive switch cases in `CosmeticBaubleItem`
   * Horn/drum variants should be subclasses instead of having a type/variant enum that is being switched over
 * Elementium armor pieces (other than helmet) could be merged into `ElementiumArmorItem` with an additional constructor parameter for the pixie spawn chance (instead of duplicating the attribute modifier logic)
+  * That is, unless they get more varied effects than just different spawn chances (see [this forum thread](https://forum.violetmoon.org/d/270-elementium-toolsarmor-are-they-good-or-do-they-need-a-buff))
 * Use customized explosion behavior for key explosions instead of EntityMixin
 * Move a whole lot of item data over to components (likely including CCA item components and potentially even some Forge item capabilities)
 * Make more registries dynamic/datapackable, e.g. brews
+* Make verified multiblocks (alfheim portal frame, terra plate base, enchanter setup, gaia arena without beacon base) datapackable, but with plausability checks
 
 ### Feature candidates (potentially breaking changes)
 * nice-to-have Patchouli features we could use, that are yet to be merged:
@@ -95,8 +99,9 @@
   * remove ancient debris from Orechid Ignem (replace with Loonium in Bastion Remnant)
   * maybe extend biome bonus weight support from Marimorphosis to all Orechid-like recipes
     * adjust Orechid stone recipes accordingly (more emeralds in mountains, more copper in dripstone caves, etc.)
+    * maybe even remove Orechid Ignem as a result and let the regular Orechid handle these recipes with a biome restriction, especially in combination with data-driven configuration
   * maybe add data-driven Orechid configurations to replace hard-coded GoG changes (mana cost per input item, operation speed)
-    * GoG could eventually become a data pack instead of having all kinds of exceptions hard-coded into Botania
+    * GoG could eventually become an independent data pack instead of having all kinds of exceptions hard-coded into Botania
 * Armadillo: add it to Cocoon of Caprice as rare spawn, maybe find something to do with its scutes
 * Nether variants/behavior for pasture seed variants (either reuse existing seed types or make new ones to make nylium) and floral fertilizer (spawn mushrooms on nylium)
 * Switch ender air collection to use managlass vials and maybe also alfglass flasks instead of glass bottles
@@ -109,4 +114,4 @@
     * Con: Probably an automation headache, since full and half-used flasks do not stack with each other and count as compeltely different items for filtering.
 * Adjust order of colored items in UIs to match vanilla sorting (which is different from the order in `DyeColor`)
  * Item order in creative inventory for flowers, petals, etc.
- * Storage order in flower pouch (needs data fixer to migrate to item components anyway)
+ * Storage order in flower pouch (~~needs data fixer to migrate to item components anyway~~ item components will be a breaking change, world update support is not planned)