With Arcane being such a huge success, lore has come more to the forefront of League of Legends. While some champions are in dire need of new lore, some need to be completely reworked and some just have awful stories, there are a lot of gems out in the League of Legends universe. Lore is an essential part of League of Legends.
Sure, you don't need to know that Ekko had to watch his friend die over-and-over until he finally manged to work out how to use his time machine perfectly, when you're playing him on Summoner's rift, but it's such an interesting tidbit and brings these characters even more to life.
With games like Ruined King: A League of Legends Story, we got to see into the lives of other characters and this has also furthered the lore agenda of any League of Legends fan. Now imagine how much more lore we can indulge in when the MMORPG finally releases, right?