After one and a half decades, there is a serious problem we have to face:
The huge amount of ISK and strategic reserves have been made and stored. That’s a very realistic problem since New Eden is very much a real society.
The big corps and Alliance have farmed those ISK and reserves that normal players can not even imaging.
And also this problem applies to the Chinese server( Serenity), and maybe worse, because there were about 5 years of Farmville era with auto-farming bots everywhere in nullsec, I don’t have the data, but I will believe Serenity may have more ISK than Tranquility, I have seen the numbers you won’t believe, I have seen multiple toons have the wallet with more than 3500 trillion ISK each (if you want to know, it’s: 3,500,000,000,000,000 ISK).
How much do you have? So far so real?
But do you know what is unreal?
In the real world, the US navy spends about 12B $ to build a nuclear carrier, but has to spend more than that to maintain the carrier, which is about 40B for the life-time cost.
Besides a nuclear carrier that able to sail 40 years but still need to have a refueling and overhaul like every 10 years, the regular military ships and military vehicles will be considered outdated after like a decade, and in the cold war era which is more similar to New Eden, 5 years is how long a module of the tank should be updated.
But your dreadnought is built in 2005 and have stored for 15 years? No problem! Still in perfect shape! (forget about the Nanobot thing in lore, it just a Deus ex)
Now you can see, if a faction establishes their hegemony in a period, they are able to collect a huge amount of reserves and stores them with no cost, and that’s what happening in Tranquility and Serenity. Russia will like to be in this kind of world that they will still have their fleet and steel torrent.
So, there should have a system to make an old, long-lasting ship more costly to use, at least capitals or super capitals. The mechanic could be it will make the keepstar cost more fuel blocks if there is more capital in it. Or after a certain time, a capital has to go back to a keepstar or NPC station to have maintenance, with ISK paid to the system, and maybe some nanobots cost, if not, it will have a debuff up to cut 80% HP and resist.
I’m not making a proposal about a whole system of capital ship maintenance, just to make some examples, I sure it’s not a perfect idea, but you can see my point.