Does packing ZODB database affect Blobstorage?

I've noticed that a site which has very low traffic got some high disk usage. Most of the disk space is being used by the blobstorage directory.

How does deleting content with blobs affect the usage for that directory? And packing the database?

I've read, but the doc does not mention anything about that.

in an classical ZEO or FS storage setup: deleting an object in Plone does not remove the blob. Otherwise the transaction could not be rolled back.

It gets removed after packing the database.

I've seen something similar with some older Plone/ZODB versions.