Electrician who came to install my new panel referenced a product in the market which continuously tracks ground. In fact he showed me the app showing ohms value of the ground in place. Its quite useful to know.
In any electrical circuit perhaps the most critical aspect is having a good ground. nEC codes here in US call for < 25 ohms. Now, accidentally, nature, corrosion, landscapers, etc often cause havoc to those underground ground rods. I know there is the bonding to the water mains also but water and corrosion are darn good buddies. The bigger problem: no one will EVER come to know grounding is gone or non complaint anymore. So having Sense notify users that it found insufficient grounding will be really useful.