Comment by instaclay
I have a iron filter that works via app. All configs can be done with button presses on the valve but in a much more tedious process/workflow.
It connects via bluetooth and not WiFi. If the company goes belly up, I'd just need the APK and an android phone to continue using the app to configure the valve and see/download water usage data.
Fast forward 20 years when I can't install the APK on android v79, I'd need an older phone to run the APK.. but that seems to be pulling hairs.
Apps would be great, it's how you handle the backend to it that's the gotcha.
I also have a water softener with an app that no longer works that had it's backend shut down. It can still be configured via the valve head button presses, but none of the "smart" usage data is available. As an example of good design, this is a perfect dichotomy of one company doing it well and one company doing it un-well[sic].
Not only the backend, but what happens 40 years in the future, when our phones don't run the app anymore, or we're all on phones that are totally unlike the phones of today, or if we don't even have phones or apps? I would expect the car to still work after that long, and making it dependent on a technology that is specific to a particular decade risks premature obsolescence.