Talk:Update 0.15.0/@comment-27634100-20160504182109

Darthwikia said that the observer block will power the piston if there s a block update nearby but i am confused why??like he said if a block nearby is set on fire then it will extend the piston but redstone doesnt work like that we have to apply power like from (lever etc) so why is this feature required?? Why cant we go with the simple redstone machanism ??this is super confusing!!!