True, but original electricity stayed the same, even the turbine generators still in use are very similar. (Same with steam power, still in use today.) Batteries are improved but general operation is the same. There's many more devices using it, mostly for the better.

We don't even know if we want LLMs in more devices. Likewise we likely do not want Internet/email in every toaster.

LLMs staying the same would be the death of this technology. Even minor improvements don't matter enough.

Voice activated devices are not necessarily paradigm shifting either. We had these for over 25 years now.