In reply to Greg Phillips.

Thank you, there are some other blogs on IOS-XR and NX-OS. This is related to IOS-XE. Below link has some blogs on IOS-XR.
https://blogs.cisco.com/author/shellycadora

Not exactly sure what do you mean by Multicast joins related to streaming telemetry. Because streaming telemetry is more like to get operational data from devices for troubleshooting and analyzing.