I disagree, people have used phones without voicemail for decades, they know they can retry. And when I miss a call from an unknown number I can easily look it

I disagree, people have used phones without voicemail for decades, they know they can retry. And when I miss a call from an unknown number I can easily look it up if I'm expecting important calls. There are also apps that helps with that, showing who called you even when it's a new number. About robocalls from doctors and pharmacies etc I also manage those comms via email, I take care of telling doctors and pharmacies to give me an electronic prompt, most have a computerized system that does that anyway. There might be people who need voicemail, but I don't buy that it's so common, it's more about people being used to it and not knowing they can turn it off.