The useful moment was a Friday closeout when a vendor needed a huge folder before leaving for the weekend. Normally someone in finance ends up making a mess of permissions or asking IT for help. This time the link went out, the vendor opened it, and nobody had to turn it into a mini project.
I like tools that stay out of the way. Not perfect, I guess, because people still lose track of which link they sent, but the basic job felt calm. That matters when the deadline is boring and real, not dramatic, and when nobody wants to spend ten minutes explaining another portal login by Monday.