All features have been ported to Blender 2.8
[WARNING!] 3.41 is currently an alpha version: it means it’s not ready yet, there may be bugs, crashes. Especially since Blender 2.8 itself is still in alpha stage!
It should not be used for production or serious projects. It’s only for testing and experiments, for informed users who want to play with the rigs in Blender 2.8. The latest stable release is the 3.40 version for Blender 2.79, download and use it for production usage.