Just to elaborate a little further on this. The 12 minute cap was because of the old file system/file handling. As Tim already points out the current limits of 20-30 minutes are mostly due to the EU import duty of 5-12% to any video camera. In general this means that to keep prices more consumer attractive the camera manufacturers put a recording limit on all the cameras that are theoretically intended as a photography tool. Camera's intended for filming instead of photography do not suffer this limit (such ash the action cameras and camcorders).
To my limited knowledge there are no compact cameras like the RX100 that do not have this issue. I'm a bit surprised by your choice of equipment but each to their own. There are a few DSLR type camera's that can be tricked/hacked to remove the limit. The one that I know of is the Panasonic Lumix G70/G7 (depeding on where you are in the world). Not sure you would want to go that way though.
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