While many people with a long history in FOSS development have no issues at all with mailing lists as primary form of engaging with their community, they have undoubtedly fallen out of fashion in favor of various chat/messaging systems or web based forums.
We're looking forward to see whether this web-based approach will facilitate more and/or other people to engage with the Osmocom developer/contributor community.
Feel free to join and get the discussions started. If there's a need for more categories or sub-categories, just let one of the moderators know and we can help with that.
The old mailing lists will continue to remain available for those who prefer them.