That would be me.
I don't own a cellphone since 2004. I've got tired of being constantly available (and disrupted), so I ditched the damn thing. It may not be practical for everybody, but it works for me. The world has its own pace and I have mine.
For me, the biggest inconvenience of not having a cellphone are those businesses (websites) that insist on a "cellphone #" being a required field during a sign-up or when requesting a quote.
Disclaimer: I run my own show.