Mats are capped, credits are not. And of all the progression roads in ED, the credits path is the only one that is not optional. With carriers being ridiculously cheap to run, they represent a milestone only and therefore not really "end game" content.
FD had the opportunity to introduce an "end-game" by keeping FCs expensive to run (but upkeep is ridiculously cheap now, so you can buy one and forget about it). But by allowing them to have money printers installed (UCs with no connection to the BGS) and making tritium the only commodity needed to run them otherwise, they essentially missed the chance to make them actual mobile markets with a need to gather commodities and trade within the BGS to be successful. There was a base management opportunity available there, but not now.
So let's ask to get rid of them again, roll back to before the beta, and FD can then develop them fully and we can test them again in a more viable form.

S