I'd like to add that many people shoot far more photos than needed because digital photos are essentially free. They only time they aren't free is when you are short on power or memory.
These are an interesting couple of issues.
Short of memory ? That really isn't much of an issue now, especially for landscape photographers. The OP's RX1 can probably get 1000 RAWs onto a 32gb SD card cost = £20 ($30). Even if you shoot 'digitally' ie copiously, having enough cards doesn't cost much or even take up a lot of space, even if back packing.
The power issue is more complex. Ironically a bigger DSLR can probably shoot more than a small compact, no power sapping LCD screens there. My 1DsII could shoot for days and over a thousand frames on one charge when new.
There's probably a good case for compacts with optical viewfinders that can shoot without using an LCD screen to keep going longer, but that's another thread really.
As the OP says, experience allows you to optimise your settings and shooting methods to maximise battery life. Then may be just add some cheap clone spare batteries and you should be able to keep going for quite a long time.
When on a long journey with limited power, shoot like you only have 3-4 rolls of film. Before getting out the camera, stare at the scene for a minute and ask, "Is this something I would print or sell?" If not, enjoy the view without taking a photo. You'll be just as happy, and you'll get just as many keepers.
Not so convinced about this.
It took me a long time to get out of the old 'don't waste film/money/resources' film attitude. As a result I find the freedom of guilt free digital shooting has dramatically increased by success(keeper) rate. I still find my best shot is usually the first of any sequence of a particular subject, but I wouldn't want to lose all the shots that got better after the first exposure. Sometimes the subsequent images aren't always 'keepers' but serve to remind me of the the original inspiration and help remind how I can optimise the best image in PP.