I've come to appreciate the pragmatic utility of faxing, because many businesses will accept a faxed signature and/or notary stamp in place of a mailed hardcopy.
On the other hand, the image quality is terrible. I'm in a three month long process to recover a check lost due to a fax image quality issue, presumably between two document management systems - a "5" was transmuted to a "6" in a postal address. The receiver of the fax has said it is a clear "6" - I'm not sure if this is due to that well-known glyph-based compression bug in one of the document management systems or something else.
I've also had occurrences of businesses accepting faxes, only to have the person actually doing the work request a higher resolution scan be emailed. Some businesses have moved to plainly announcing the acceptance of scanned documents by email, but really everyone should.