That's the main problem with games that continue to have major features added to/changed in/removed from the core game long after they've officially been "released". Frankly, this game's development should've ended at least a decade ago, and had any ideas the devs had for improvements or changes put into a sequel. Realistically, there could've been at least two direct, iterative sequels by now, which would've left the older iterations still readily available for play for people that preferred them, or just wanted to check them out. Or they could've released major new features as some combination of DLC -- free or paid -- and optional settings delivered via free base-game updates, so that people could pick and choose the experience they want.
The sort of rolling, indefinite development these (and other) devs have chosen, where all features are delivered in all-or-nothing updates, is absolutely terrible for preservation of earlier (sometimes very different) states of a game.
