@requiem I cancelled my home phone and now subscribe to a SIP trunk and couple DIDs (transferred my home number to one of them, other one is for business), and I run an Asterisk server in my garage.
But I'm weird so I don't expect that solution to work for normal people.
What's cool is that I live near Allison Smith, so if I wanted a custom voicemail message that is an exact match to the default asterisk prompts it would be convenient to get that done!