It might be that pbfs are stored inside sqlite? The whole thing is really incredibly confusing to be honest. What I can tell you is that my vector slippymap XH

It might be that pbfs are stored inside sqlite? The whole thing is really incredibly confusing to be honest. What I can tell you is that my vector slippymap XHR is requesting .pbf files, so that would definitely imply protobuffers as the wire format. Ultimately that's using t-rex and mapbox-gl.js, so... not sure if there's something intermediate. But the mapbox docs say sqlite? I'm just very confused now.