It’s still straightforward and inexpensive to get great sound without an audio jack in your new iPhone 7. The key is choosing the right gear for the job at hand. These particular accessories were chosen from personal experience to handle each of the commonly encountered situations.
Best of all they are backwards compatible with your iPhone 6 and earlier. After using each of these products I think Apple was right to forge ahead with the wireless approach.
Your ‘Key to Survival’ is wireless audio via Bluetoth or AirPlay:
Home Speaker (Bluetooth – wall powered): Sonos famous room-filling sound
Portable Speaker (Bluetooth – rechargeable): great sound on the go from JBL
Audio Transmitter for Car Radio (Bluetooth to FM): listen in the car without wires. Pairs automatically. Full review available here
Audio Transmitter for Car Radio (Bluetooth to Cassette): wireless for older vehicles
Home Theater Receiver (Bluetooth and AirPlay): great versatility and awesound sound fidelity. The center piece of your living room sound system
Audio Transmitter for Receiver (Bluetooth): use your exising amp and speakers for the best wireless sound
Sport Headphones (Bluetooth): sweat resistant and secure fit
Economy Headphones (Bluetooth): great sound on a budget
Over the Ear Headphones (Bluetooth): best overall deal for the price and sound quality