We are actively using Web Bluetooth within our hardware debugging ecosystem (https://www.aidlab.com/developer/debug) for our wearable. It plays great role, as:

* It's multiplatform.

* You can rapidly upload the changes (it's web)

* Bluetooth 4.0+ is faster than semihosting (and Bluetooth 5 even more).

* You don't have to use wires.

but what worries me is that there is a visible slowdown in the development of Web Bluetooth (at least when we compare it to the rapid growth in 2015-2017). Is it going to be a dead technology soon? Because it is way behind being a mature tech.