Everyone at Amazon (The only company I have seen using it) hated using Chime, and it wasn't at all on the level of competitors. So I think it was just an unsuccessful product.
Early in the pandemic I had to use many different systems as an academic, when lots of different contacts pivoted online in different ways. Chime was the least of my problems; it just worked when many other systems struggled.
I liked the Chime meeting/calendar integration at Amazon that could ring everyone at the start of the meeting, meaning that most meetings started promptly.
> Note: This does not impact the availability of the Amazon Chime SDK service.
https://aws.amazon.com/blogs/messaging-and-targeting/update-...
https://slack.com/blog/news/slack-aws-drive-development-agil...
Unofficially, this agreement happened at the same time Amazon started using slack internally
Hopefully they just adopt Zoom and not something even more obscure.