My plan in my youth was to be processed into fertilizer for someone's marijuana patch.
I find cemeteries very interesting for the history they contain, like the fifteen or so toddlers and infants buried, all in 1892, in Duncan, Oklahoma. Measles, apparently. But yes, cemeteries are a pretty big waste of space in areas that have too little space. Cremation with scattered ashes or with closely-spaced urns would be way more practical, and I, at least, would be less icked out by ancestors' ashes than by formerly formaldehyde-soaked bodies.
The whole subject of remembering/memorializing the dead is pretty odd, too - humans are the only critter that seems to do it beyond a few days.