Steam

[Ikkir Isth]

We are at the very least getting partial resets:
Old cities and old ships.

Steam probably would more like things to be a full reset than not, but having a backdrop of existing civilization could also be interesting.
Other than that, I mean, you could wipe currency and city / ship inventories to even the playing field and delete obsolete items, not that it really matters too much in the long run, as a sort of compromise.