"In 2025, Garmin announced that they would end their certification for ANT+ devices, blaming changes in wireless communication regulations. This is likely to lead to future devices dropping ANT+ support in favour of BLE."

https://en.wikipedia.org/wiki/ANT_(network)

I believe that's what the author was referring to when describing it as failed, but yes, this could've been worded better.

Aha! OK that's sad news but makes perfect sense. Thanks.