My wife had an unlimited plan on her phone, and was resistant to switching to a shared plan, but I showed her how little data she used compared to what she thought she did, and that "unlimited" meant 3gb with severe restrictions after.
We also had 4 other phone lines, mine with 200mb, 2 other shop lines with 200mb, and grandma's traditional phone. When I showed her that for the same money, we could have a 10gb share plan, everyone gets unlimited talk and texts and shares the 10gb data, so if she wanted she could use 9.5gb as long as the total did not exceed 10. We can also hotspot the ipad and not have to pay for a line for it. She was sold and we dumped the "unlimited" We have yet to use over total of 4gb, but with the number of devices, I would save a total of $7 by dropping to 4gb so I just leave it.
I am actually the biggest user of data. I listen to my favorite talk radio station on iheart radio for an hour in the morning and in the afternoon (can't pick it up on car stereo) So 2 hours a day, aproximately 20 days a month. Uses about 2gb. The biggest use of data is of course movies.
And I am glad for the unlimited minutes, grandma at 99 loves to talk to her daughter across the country and her friends. Last month she used 2200 daytime minutes. With our old plan, we had 850 plus rollover and we would have to tell her to be carefull about daytime becuase she would exceed the limit, now it doesn't matter.
t-mobile has recently interested me, their plan for 5 phones would be about 60% our current plan, and I like the idea of putting a down payment on the phone and 24 monthly payments separate from the service. When the device is paid off, that part of your bill dissappears, vs continuing to subsidize the device. Also, no 2 year agreement, every service plan is month to month. If you quit before paying off a device, all you owe is the remainder of the device. Unfortunately, ther service in our area has been dismal, but suposedly getting better.