I've seen no activity from the devs/reviewers of this project in 6 months.

I would really like to see a fork of this mod because the current pull request aren't being merged and it seems dead.
Schauweg hasn't contributed to anything on Github since November the 2nd 2023 and there are obvious issued such as no official 1.20.4 support and a sophysticated storage/backpacks incompatibility.

Tell me if you know about one/create one please, this mod is really cool.

I already suggested Tiny Item Animations to merge/copy the fonctionnality of this mod to save it but they don't seem instrested:

[Feature Request] Add/Merge with Smooth Swapping mod #11

https://modrinth.com/mod/smooth-swapping-1.20.4-port

Nice !

Could you add Sophisticated backpacks/storage compatibility ?

Both mods on 1.20.1, not 1.20.4, I don`t have plans for it)