Your scope is too narrow - instead of land lines or email…think electronic communications networks. Everything from the telegraph, to the deep space network sending commands to Voyager 2.We've officially moved from comparing Bitcoin to fire, electricity, and the printing press to gravity and the speed of light. What's next, retconning Bitcoin into the creation story alongside Adam and Eve?
Tell that to the Bitcoin Cash advocates.
And lo and behold, the relevance and usefulness of email has been steadily declining over the past two decades as alternative technologies have eclipsed it (smartphones and a myriad of social media apps/sites). Oh, and how's your landline telephone doing these days? That was once a universal and indispensable network that literally underpinned the global economy. Now it's an afterthought, a relic. The network effect is extremely powerful and seems insurmountable - until it isn't.
Electronic communications networks - analogous to:
Digital gold network. That could be base layer bitcoin sending large amounts of value, lightning network sending smaller amounts quickly, and cashu mints sending small amounts instantly and privately. Dozens of other things built on bitcoins absolute scarcity that have not been invented yet.