A bicycle tail light that wirelessly connects to a central computer to turn itself off? I really hate the timeline we live in. Back in my time a bicycle tail light was connector to a dynamo and a capacitor. It would automatically shut off after a minute or two. No Bluetooth required.
Turns out, the simple way had some shortcomings that were only solvable by making things more complicated. I don't see an alternate timeline where that isn't true, unless we stick to an agrarian society. Banks were a mistake.
What shortcomings did it have? Like never having to charge anything? Not needing an app? Not needing wireless communications? Not needing to pair? Sound like terrible shortcomings.
There is no amount of words that can explain it. If you don't have first hand experience, you are not going to understand it. And it's fine if you never use Garmin (or another bike computer), and you can be the biggest skeptic, but I don't think it's helpful to describe he experience with words.