theres a number of reasons to have it.. but just like in many other strategy games where u have income of res (without a negative flow) where u can see how many harvesters u have per res (starcraft and age of empires come to mind) it would be nice to see ur income rate (since it would mean more than seeing ur number of relays which get into the stupid numbers late game)
- u might have a high pool of quanta but low income (relative to game time) without realising it
- enemies might kill ur quanta relays, and u arent sure exactly how many were killed and u have no idea how much it effected ur income
- helps planning with how long u will need to wait till the next upgrade, ability, boost etc
u understand there is more to this than u previously thought? 
