You can grind postgame. I wouldn’t say there’s no progression… upgrading everything and everyone to the max would take a huge amount of money. I played for a few days after the end of the game but I was pretty much ready to move on from the game at that point. Absolutely loved it though… it’s worth picking up.
For anyone reading this that is wondering what FPGA stands for, it’s Field Programmable Gate Array. Just figured I’d save some people the trouble of looking it up.