I follow llama.cpp pretty closely as I use either llama.cpp itself or projects that depend on it all the time, and one thing that I don't think gets talked about is the sheer scale of community involvement. It seems like a logistical nightmare, but somehow thousands of different contributors are opening hundreds of PR's every week and getting them merged in to support various hardware or implement a new pattern or algorithm from a recent research paper. It's really quite awe inspiring for me to see, and think it is in no small part because of the leadership of ggerganov - so I'm happy to see that he is sticking around and plans to keep building this incredibly useful tool that has grown into a huge community at this point.
I have been using a PR branch to run GLM 5.3 flash locally so I have been watching the dueling PRs develop to implement it and all the comments and reviews. You're right the scale of it is huge. The speed with which maintainers and community are responding is also super impressive.
I know there's a lot of discussion about AI overwhelming OS maintainers and I can see that. It does seem like llama.cpp is successfully riding that dragon right now though.