terrains only use was for lazy people to create huge empty maps so we can drive for 20 minutes to our deaths. I never once saw a good build on terrain. good builds were always on slate and variants...
can you name a TDM where you had to drive 20 minutes to your destination? or is that an over-exaggeration made so that your point seems valid? even if they did exist, you weren't forced to play on those maps. lots of people found large scale maps fun, that's why jorgurs dogfight always had a big hoopla when it was hosted. if you want to see a good build on terrain, load a duplication save of something and put it onto the slopes.
I know for a FACT thatslate is for lazy people who don't like working with constrictions! they obviously don't like to challenge themselves to working with existing surroundings! Frank Lloyd Wright is famous for his organic architecture, he would see slate as a handout, something for the lazy! Slate is used to create small, confined, deathmatches so you can walk 2 seconds to your death. There's nothing good that came out of it except laziness!