Hello @Raff, just wanted to add my 2 cents.
We’ve spent some time trying to find a solution for DAM that would be extremely simple and would support various FS backends.
Some solutions are super complicated, some written in Java or PHP (eww) and at the end, we thought that Strapi could solve this pretty nicely. No content types, no extra plugins, just plain Strapi with Media library.
Our requirements were:
- file upload of any type
- searching over an API
- AWS S3 integration
- Being able to provide metadata with files
I’ve done some research with strapi v4 and it looks pretty nice and solves most of the painful issues. Having the image crop is a big plus here as well.
One pain point that the default integration does not provide us with is the metadata. I have not found a way to extend the media library or the media modals to be able to provide custom input fields, or to extend the media library to provide own modals with input fields or similar.
It might be possible through some content-type connections, but is very ugly solution
This pretty much disqualifies strapi for us, although I’m going to spend some more time trying to get this working and see if we can come up with the least painful resolution without having to implement the library ourselves 
So my feedback/feature request would be to allow extensibility into media library.