The first response people have to the idea of using a radio is, "Why bother, I have a cell phone?" I noticed this with marine radios decades ago, long before GMRS became a thing.
New boaters would rely on their phones, solely, often running multiple applications such as maps, music, weather radar, marine specific nav (it's a thing), etc. Then they discover that communicating with other boaters isn't so easy. Calling or texting means those other apps have to get parked. Calling the group requires setting up a conference call, and anyone who thinks it's simple to text in the bright sunlight while bounding over the waves has not tried it. They soon learn that using the radio for comms is not only much easier, it leaves the cell phone for other things. I won't mention all the drama associated with dropping one overboard.
Same for road trips.