I’m with British Gas for gas & electric. For months they pestered me to get a smart meter and eventually I gave in. That was 4 years ago.
now the “in-home device” (the thing you monitor in your living room or wherever) has stopped working. I contacted BG and to my surprise was told “tough” after a year we don’t replace them! So much for the eco policy of being able to monitor your use at a glance!
I was led to believe this device was part of the meter, not a “while it works gimmick”
Not quite as instant, but you can usually log into your supplier and check consumption data with a 30 minute resolution.