I am noticing that my 4 years old Samsung Galaxy Note 9 is getting slower and laggy with every security patch update. I don't expect the cheap tactics, that Apple does, from Samsung i.e. deliberately slowing down old phones with updates. I can't help but notice it. My memory is quite empty (40gb still free) and I am not a gamer or heavy user but I have been facing this issue since the last few security patch updates.