Adaptive Cards have been around since 2016: https://github.com/microsoft/AdaptiveCards/graphs/contributo...

It's a healthy project, with multiple development teams within Microsoft both using and contributing to it. If you scroll down the originally linked homepage, you see 4 Microsoft products that have used it, 3 of which are in active development today.

It looks like a lot of documentation is pointing to the wrong branch. It took me a minute to understand why I was looking at code that hadn't been touched in 2+ years. The docs are pointing to the "master" branch but everything has moved to the "main" branch.

ex. https://docs.microsoft.com/en-us/adaptive-cards/rendering-ca...

filed https://github.com/microsoft/AdaptiveCards/issues/7475 to track :)

It's not so new, but its MS, and the thing didn't look like a popular one, so chances for it to be abandoned are very high, I suppose.

It's also MIT licensed, and we're still very much working on it :)

I don’t believe it’s particularly new. Microsoft has thoroughly embraced this in the Teams API, so I wouldn’t expect it to go away soon.

This has been around for several years now at the least