Wow. I commend your mom for being so advanced! I don't know too many 72 year olds that I'd give an iPhone to.
Hey, watch it, there, kiddo!!!! Some of us (I'm actually older than the OP's mother) are the ones who pioneered the use of personal computers and smartphones! I have been using computers since the mid-1980's and had my first personal computer at home in the very early 1990's. On Launch Day of the iPhone in June 2007 I was one of the eager and curious people waiting in line for this amazing, magical new gizmo that Steve Jobs had been promoting and which some in the media were referring to as "the Jesus Phone" -- and, mind you, until that day none of us had seen one in person nor touched one right up to the time we were finally able to walk into the store and purchase ours. This was something brand-new and revolutionary, different from all the other cell phones most of us had become accustomed to using. I still hadn't touched an iPhone until after the sales transaction, where the person at the register handed me the bag which contained a box with my new iPhone. There was no setup in store, we had to do it on our own at home. On the way out, I paused at the display table and for the first time saw what I had just spent $600 on..... Took my new device home, unboxed it and marveled at it. Once I got it set up, including having to port my number from my old cell phone to AT&T, and actually began working with it, I saw the significance of what this could mean.... At that time, with the first-generation iPhone the only apps available were on the iPhone itself, the App Store not yet having come into being. It was clear that this little device offered a lot of possibilities for the future even as we pioneers poked at our new devices and played with them.
In 2010 once again I was in line at the Apple store -- this time for the first-generation iPad. Another exciting new device which became an immediate favorite in my household.
There are plenty of us "golden oldies" who indeed have embraced modern technology and who may even have played a part in developing it or getting it to market.... And there are quite a few older folks who, even if they had never used a cell phone or a computer before, have found that using an iPhone or an iPad is surprisingly intuitive and in many ways easier to use than the old flip phones. One of my good friends, a woman in her early 90's, and I regularly communicate via email. Until just a few years ago she had never used a computer, wasn't interested in learning -- but someone gave her an iPad and she found that it was a wonderful way for her to keep in touch with family and friends all over the country, and that it also was fun to shop online, too, or read the daily papers and keep up with news.
Don't be so quick to discount older people and their capabilities. One day you, too, will be a "golden oldie"........