[pas]

Not enough viable endgame strategies, not enough units/factions/styles. Not enough mods, not smooth enough control/UI/UX.

Other than that, then engine is amazing, the concept is solid, the potential is there, the possibilities are endless! ChronoShift or what's that nifty feature is amazing for keeping long games in-sync with each other, and so on.

Currently Zero-K delivers the most fun in terms of time and money investment needed.