I am sad that cellular modems in portables isn't a bigger thing. It was a feature before it's time. Now that the world is far more interconnected than before, it would be more useful that it used to be.

On one hand, I would ask why? I always have my phone with me to use as a hotspot and I usually have my cellular iPad. The iPad can last 24 hours as a hotspot (https://www.imore.com/yup-ipad-air-still-gets-24-hours-batte...)

On the other hand, seeing that I always have my phone with me, I don’t need my cellular connection with my iPad either and I could save that $20 a month.

I do wonder if even T-mobile would be as generous with data with a laptop as they would with a tablet.

Most Windows users especially do seem to at least carry around a mouse with their laptops. Carrying a 2/3 pound - 1 pound iPad in your laptop bag is also something a lot of travelers do.