As a Roblox developer, it is currently too hard to get a list of bundles that a user owns. The GetInventory method allows developers to easily get a player’s inventory and the AvatarAssetTypes they own. However, the method does not currently support BundleTypes. As a result, developers still have to rely on web APIs to check what bundles a player owns.
If Roblox were to address this issue, it would allow developers working with avatar-related systems, that check through player inventories for owned assets, to also easily check for ownership of bundles such as Animations and BodyParts. This would remove developers from needing to rely on external systems to access the web APIs to get this same data.