I have been playing since December 19th, 2020. I am still in the ages and have not yet reached the era group. I am in the Early Middle Ages (EMA). I don't know if there is anything as per game mechanics that would make EMA great, but I like it because in EMA most of the gameplay can be enjoyed. The tasks are less resource exhaustive and can be completed most of the time for events. I can participate in battles and earn rewards even if they are small. In this way, I can lean towards developing my Great Buildings. The game is slow; honestly, sometimes I lose my patience, but I can not afford to pay money for personal reasons. Yet even with a slow pace, I can take full advantage of most of the game plays. Maybe someday, when I have my Great buildings leveled up well, I will start progressing towards the eras. All the ages and eras look so great and it's tempting to progress towards them. But I should keep patience and work towards my city gradually. Till then, EMA will remain the age of my city. I have attached a snapshot of my city. Please pardon some double lanes, I need to reposition my buildings again.