Could Bitcoin have a fixed difficulty? Could Bitcoin have a fixed difficulty, how to implement that for a test and what would that mean in terms of mining? Would there be a difference if mining with a big rig or just a wallet?
If the difficulty were unchanged from its original target of 1, today there would be 16 trillion blocks mined every 10 minutes. 

This would break the network instantly, it would not be able to maintain consensus, and would be creating something in the order of 33,000,000 gigabytes of blocks per hour, which would exceed all storage available in the world and consume all of the available internet bandwidth. 

Suffice to say, this wouldn’t be ideal.