Node Group Presets

I really like this extension and it adds a feature to Blender, which I think should be integrated by default! I'd like to suggest adding the option to save presets in another way than inside the data-block. Maybe even saving them as a separate .txt/.xml-file or whatever. Because in my case: I provide a library of node-groups using Blenders Asset Browser. This extension fundamentally works well with this, as the list of presets will load when adding the node-groups. So it is great from a creator-perspective! But as the perspective of an user, who wants to create and manage their own custom presets, there is currently no flawless solution to save them, as the asset browser will by default just append them and not write changes into the file. Of course the asset browser can be set to link assets instead of appending them, or users could create them in the .blend of the asset library source. But when updating an asset library, the .blend-file will usually be overwritten, which would then also overwrite all custom presets made by the user, even if the update doesn't affect all node-groups.

Simply awesome!!! Is it possible to apply a preset to multiple node groups at once? When multiple node groups selected, the preset only applies to an active node group.