I'm not the commenter you are responding to, but we've been using webrtcbin in a production system since late 2019. We had some help from Collabora's consulting services (specifically from Olivier and Aaron!) and our use case was pretty targeted (near real time broadcasting of a video stream to a handful of internal users) so YMMV.
EDIT: Didn't realize you were the author of Pion! We looked at Pion and Janus when we were evaluating, but ended up using GStreamer ultimately because we had other GStreamer components within our pipeline.
If you saw anything when evaluating Pion that could have made it better I would love to hear. Always trying to improve. These threads are super exciting since I get a general guidance.
Existing Pion users are biased/accepting of its flaws ;)
EDIT: Didn't realize you were the author of Pion! We looked at Pion and Janus when we were evaluating, but ended up using GStreamer ultimately because we had other GStreamer components within our pipeline.