Many of the/the current ones seem to malfunction - if it's a British Gas one you then have to deal with their appalling anything but smart call centres and useless chat operatives.
They don't give a damn.
Just waste your time. So the smart meters are anything but a timesaver.
Once you get a smart meter from british gas the idiots seem to make it impossible to enter a reading from the web online account page - fark knows what it's for - what is smart about that?
I also don't trust them to not be hacked.
I have no desire to link any appliances in my house to the internet - why would I?
With a decent company (British Gas is very definitely not) it is no problem whatsoever to give regular updates to the utility company via an online account - always assuming that your meters aren't under the floorboards or somewhere really daft.
I like tech (I spent much of my life promoting it) but use it appropriately - some tech actually hands control to other people/makes things more complicated if there is a fault.
So I'm with
@Drago on this.