Imo, this is kind of a hard copy and proof for the return receipt that matter most for those oldies, and it will be much-much easier to use whenever there is a dispute raised because of communication failure, email just can't beat this easily in term of simplicity.
In some countries fax receipts got the status of legal proof of transmission of a document. That happened at times when they had a single government-owned telephone network operator, when you had to get your separate fax line and the approved fax machine from that operator, and when the operator configured your machine so it would really only send your number in the fax status line.
What could possibly go wrong? Progress hit. And deregulation. And the laws didn't keep up, so a fax receipt can sometimes still be a good thing to have in case of a dispute.
At my employer we got rid of almost all physical fax machines. One reason was that with every generation of fax machines they got more complicated. Especially when you were only occasionally sending a fax.
Page up or down (no, these artistic icons supposed to tell you the page orientation aren't of any help)? Top or bottom first? First dial number and wait for connection, then insert pages? Or first inserting pages, then dialing? Or insert paper after dialing but before or after connection? When does the thing do automatic redialing? Can the pages be removed already during redialing? Dial *, **, R, #, ## or whatever to get a line? But don't forget to insert one or two 'P's for pause between the * (or was it R?) to wait for a line. Oh wait, it isn't sending anything? Instead, it thinks you are loading it with a template? Well, ok. Lets just hope that no one manges to press the magic button combination to send the template to all numbers in the build-in address book, again. Yes, it happened. New rule from management: Don't have any numbers in the build-in address book. Yeah, if that thing wouldn't like to add numbers to it almost on its own.