For that to happen, the value of the data it extracts would have to be greater than the cost of installing and paying for a cellular modem and the data fees over its lifetime.
I think most of us aren't worth it, as it would take away from the upfront profit of the machine to add features people aren't told about just to get a few years of "Subject opened left door. Temp 39 degrees. Subject used ice maker." or whatever.
I think you're underestimating how cheaply a manufacturer could negotiate a one time fee low bandwidth 5G connection for. If it's setup to only upload in off peak hours it's going to just be free money for wireless carriers. Maybe they'll double dip and buy the data for themselves as well.
I even saw the newer broadcast TV standard was going to have 2 way communication for ad tech.
