>>514504767It's one of the features that people just use and has been a thing for so long it's ingrained into their gameplay and the players motor sense. Removing stuff like old masteries makes sense because it's just a numbers game but things such as displacement, cleanse, teleportation, these give core advantages to providing interesting solutions to situational problems that aren't just flat out damage or healing and so on.
I think if they remove summoner spells the game not only would be quite boring but terribly unbalanced too due to the lack of mobility some champions have, and to balance those champions from being abandoned the devs would probably have to adjust them with generic stuff like more damage output which wont help solve any of the issues they face from being easily chased and blown up or chipped away.
It's also why people miss items like galeforce and the old stridebreaker with the mini dash because those things provided extra gameplay opportunities whether it was for defensive or offensive purposes. Things like the old everfrost and duskblade were also incredible in adding more depth into the game despite all these items having criticisms over how unbalanced they were due to the amount of powerspike they provided which they could've just adjusted the stats down to make it less so.
The current state of items all sorta do the same thing but in different flavours (blackfire torch, liandrys, malignance), most of them are also done so passively which means the players don't really have any agency with them which I think makes a lot of these items incredibly boring to play with and against.
Stuff like summoners, activatable items, things like that are more interesting to play with for better or worse and provides players interesting gameplay instead of, say, having to play Jax all the time if you wanna play a chill farming game instead of Nasus because you can't ghost or tp so you will lose out on tower plates much worse than a bloated mobile champ.