For receiving faxes only, I think the fax machine is obsolete. You can use one of plenty of online services to receive your faxes. Now that many PCs don't have modems and are no longer connected to land line telephone, that fax software is no longer of any use and probably not even available any more.
For sending faxes, I think a fax machine still holds relevance. It is far easier to use a fax machine to send a document instead of scanning, saving, sending. Sending via a machine is a one step process.