Hi Marie -
As I put in my post, a cell phone helped us get an edge over our competitors by answering the phone no matter where we were back in 1989. A smart phone can save your life by actually being hands free, for one thing. Let's say I have fallen in my home and I am alone and can't make it to the phone. I can ask Siri to put my phone on speaker-phone and dial 911. There have been instances where smart phones have saved people who have fallen or been in an off-road single car accident with either "Find my phone," or even used the SAT phone capability (on an iPhone) where a cell signal doesn't exist, like when lost in a large remote forest. Not conjecture - I heard on the news one day that someone did just that after being stranded in a remote area.
Also, a dumbphone is largely incapable of sending large high-res images or videos to a client as shot, something a smartphone can readily do.
There are lots of things a smartphone does for me. One of them is that I don't have to write down serial or model numbers when contacting a company about their product I bought. I just take a high-resolution picture of the tag, which I can delete when I have concluded it is no longer needed.
I even use the built-in magnifier feature to read small print. The list goes on and on.