The gas meters may also have a facility to disconnect. In a simple world just like the electric ones they could just collect and transmit data. Instead they have sat down and thought what else could we do with them. LOL It's called progress. Most pay their bills so the extras probably do not see much use really.
There are indications that the suppliers are much like some commercial companies - they can be inclined to not do what they are supposed to do by being awkward with customers.
There are a number of suppliers. I wonder what brand of smart meters they use and if fault info is being collected centrally to see if any makes are better than others. There are a number of major brands
The smart roll out was slow due to the need for fitters. If some are more reliable now than others that are already fitted that will be a limitation again.
I suspect my smarts went in around the time when the original meters needed to be changed after a set number of years use.