The phase out is inevitable given more modern alternatives; the logic is similar to the demise of long wave radio.
Mobile phones' connectivity coverage now works well nearly everywhere (at least in our tiny country).
People prefer them because they can carry them everywhere, internationally. They now support video, and are a multifunctional computer camera calculator.
We have a copper phone landline which was used until recently for the Internet, though like many, we've had installed a fast full-fibre cable.
And probably like many households, as we decorate, we remove the old phone sockets.