Too dependent on continuous sources of electricity? The corded phone you use requires electrical power; it just gets it over the phone line instead of the power line. The phone company still needs to work to supply that power with batteries, generators, etc, and it is still subject to failure. You are still depending on a continuous source of electricity; it's just a different source.
"Most of us, when all is said and done, like what we like and make up reasons for it afterwards." -- Soren F. Petersen