Some networks charge a flat monthly fee to use voicemail, while others charge for each individual voicemail message, or charge by the minute while you're connected to the voicemail system. Some networks even charge you for simply recording a voicemail message - even if you never bother listening to the message.
The audio quality may not be perfect, but at least that message won’t be lost forever if something happens to your old device.

You can do this with lots of third-party voice recorder apps as well, like Rev Voice Recorder, Otter, and Alice, which offer some transcription. Usually for a price. The downside to this method is the quality could be sketchy. Plus, lots of people hate talking to someone on speaker phone.
True emergencies - such as extraordinary weather - should be addressed in your voicemail if it impacts your business. Thank you for calling the Carona Surf Shop. We are currently closed due to the inclement weather. Our normal business hours are Monday through Saturday, 10 am to 9 pm. Please visit www.caronasurfshop.com to order merchandise and to check our schedule during the hurricane.