While Rocket Racing was and is a fun pick-up racing game, it lacked the replayability required for a game of this type to remain in development indefinitely.
While the developers went to great strides to ensure that Millennia had something unique to offer, that Civilization did not, it appears in doing so, they ran out of time and resources required to make Millennia into an enjoyable experience.
While Thrive: Heavy Lies The Crown is slightly different to the dozens of city-building survival games that have come before it, that alone is not enough to warrant a purchase of what is otherwise a very generic and ultimately uninteresting survival game.
Despite a shakey start, Warhammer 40,000: Darktide has become one of the best Warhammer on the market, and much of that success is due to the dedication of its community and the resilience of its developers.
Spiritual Sequel? Tribute? Off-Brand Store Version? I am not sure exactly what Monarchy's relationship is to the Kingdom series, and I am not sure its developers are either.