I don't think thats it HMD. I think everyone here thinks those machines are cool. And it would be fun to be diggin in the dirt with them. Personally I'm a bit jealous!
But 15 YEARS! Even considering it as a part-time hobby, that seems incredible. That takes enormous effort and dedication. I would have played for a few hours, got bored, and picked up a shovel and been done in three weekends.