As much as it would be a nice "have" I agree with you Jeff.
The majority of our customers have a seperate fax machine..
We mainly receive faxes, so for myself and a couple of my customers it would be ideal. But sending faxes still involves having a fax machine as the softfax options (scanner to pdf, etc) are just to damn slow for daily use.
I put up with hylafax and iaxmodem, because having a seperate fax machine is pointless, emailed pdf's are great as I only print the doc's I need and not all the junk faxes I get.
I live with answering the phone to the sound of a fax and having to forward it to the fax extension because fax detection has never worked reliably.
If I wanted all the gizmos hanging off my phone system I'd install "that other contrib", but I prefer the rock solid phone system that I have instead.