Seems silly to start a new thread for this, but there doesn't seem to be one for "I got this bit of info from a dev while chatting at Pax, but I didn't interview him or anything."
Anyway... While I was waiting in line for the KSP2 demo presentation, chatted with one of the devs, learned something I thought was interesting for modders. He mentioned:
The craft files are now in Lua.
Me: Does this mean I can insert arbitrary logic into the craft files?
Dev: No comment.
Also one thing I haven't seen mentioned elsewhere, I asked Nate (head dev guy, super nice) about the fidelity of the rings - do we get rocks and dust if we fly to them? He gave me a non-committal answer (they are big on the no comments right now). So... maybe?
Hopefully this info will be obsolete soon, as they give us more details, but just thought I would share.