Uhh, what? Amenities are expensive even in the mid game. The cost of normal pop upkeep is roughly evenly split between food and amenities, and the cost of food decreases more quickly over time because it gets many production bonuses while amenities gets very few. By the midgame its usually the amenities that cost the most compared to other upkeep costs. This goes double for Hive minds and Machine Empires.
The only thing that truly trivializes amenities is the free slavery/robot servitude jobs that produce amenities without using a job slot and with (almost) free real estate. But this is specifically a late game solution since its a pop-intensive solution that will only handicap you in the early to mid game when per-pop efficiency is the most important metric.
The only thing that truly trivializes amenities is the free slavery/robot servitude jobs that produce amenities without using a job slot and with (almost) free real estate. But this is specifically a late game solution since its a pop-intensive solution that will only handicap you in the early to mid game when per-pop efficiency is the most important metric.