Garbage collection (unused assets)

Where do we stand on this matter? If I don’t start being reasonable with my image sizes Imma put a dent in the capacity of one of your boxes (ADHD + a zillion page loads to get back to the thing I remember uploading however long ago (that I want to reuse elsewhere) probably also not helping as I have found myself uploading an asset I know is somewhere just to get the post out pronto).

* I used the term GC on account of coming across mention of it in the Hugo documentation.