If you don't use a landline, why would you need to know how to wire a phone jack? See what other electrical skills DIYers don't need to keep up with anymore.
Once-Important Electrical Knowledge Homeowners Don’t Need to Know Anymore

How to Replace a Phone Jack
Who has a land line anymore? More and more homeowners are ditching their land lines and opting for cell phones only. So knowing how to replace a dead phone jack is becoming less important to DIYers than learning how to cover up this no-longer-useful home fixture.

How to Wire a Home Audio System
Thanks to Alexa, homeowners can have a home audio system without running a mess of wires like what was required back in the day.

How to Install a Floor Outlet
Fewer and fewer homeowners are finding floor outlets to be as useful as we once thought. It’s certainly a manageable DIY project for most homeowners, but do you really want to cut into your hardwood flooring?

How to Fix a Corroded Coax Cable
Homeowners are cutting the cord nowadays, opting for smart TVs and streaming services over good ol’ cable. If you’re moving toward to the cable-free camp, you won’t need to know how to replace the crimp-on ends of your coax with compression-type connectors.

How to Add Another Doorbell Chime
High-tech wireless doorbells with cameras and microphones are becoming the norm, quickly replacing their hardwired predecessors. Pretty soon, homeowners won’t need to know how to wire an old fashioned doorbell like this.

How to Install Aluminum Wiring
Many houses built between 1965 and 1972 were wired with aluminum instead of copper, which can be a fire hazard. Though DIYers no longer need to know how to run aluminum wiring throughout a home, updating the connections with sections of safer copper wire is important knowledge to have, if your home has aluminum wiring. Keep in mind, however, that it requires a trained electrician to make the updates.