Here where I live we have 4 Sprint Stores and 2 T-Mobile Stores. With one T-Mobile and one Sprint store in the mall up the street I’m sure one of them will close. With the other Sprint locations either rebranding or closing completely.
On recent versions of Android, you are not likely to see it update every second except for in specific scenarios, but I'm glad it's updating regularly for you!
For the benefit of whoever is interested.. signal updates from the OS are likely to be more frequent (but not guaranteed) if your device is moving fairly quickly (ie in a vehicle), and you are actively transferring data over the mobile network. When the connection is idle (including when you are using another connection method, like Wi-Fi), some things are not updated as frequently. Android does not publicly state anything much more specific than that.
In reality, the signal strength is constantly changing, every millisecond, faster than the screen can even update.. but there's no reason for any mobile device to monitor it that intensely, the CPU and power impacts would be crazy. An overwhelming majority of mobile users don't even need it updating even every 10 seconds. As of last year, over 314 million Americans had mobile phones.. with some quick math, SCP is on less than 0.0032% of them 😆