The main thing which is at risk from destruction is Power Poles because biters get angry about them being in the way. Track and signals don't block pathing and except under very rare circumstances wont be targeted by biters or spitters. However they can take collaterial damage from spitballs ...

I know a Mod does this, but I really would love to see this as part of the core game. Maybe even tie it into the end game. Have a technology that can be developed that uses the satellite (1 transmitter per satellite as an example) that you can use to transmit signals anywhere in the gameworld. This ...