I think 1 is a famous hero named Mi Yue, so when Mi Yue was not weakened in the early stage, it can be said that Mi Yue was invincible with thousands of people, with great attack and explosive power. Basically, it was a big move, and the other side could not prevent it, so every month in the early stage was also a hero that many people liked to use.
However, some changes were made to the rice hero in the later game, so Mi Yue's ability was weakened, which was different from before, so many people gradually gave up the hero Mi Yue.
Another kind of heroes are assassin heroes, such as soldiers Lan Ling and Nako Ruru. In the early stage, the soldier Lan Ling was also a strong assassin. Lanling soldiers have a very powerful skill called stealth skill, and they can move freely if they zoom in, so they usually choose Lanling soldiers, and they must be in sight. Nako Ruru, the only female assassin in League of Legends, is also very explosive.
But in the later period, these assassin heroes were very weak in the team battle because of their skills. In the early stage, it was awesome, but in the later stage, it lacked stamina. Even in the case of economic failure, they could not achieve fatal results, so these assassin heroes were gradually forgotten.