That's my fear of getting a S10, it has happened to every Samsung Galaxy phone I have owned. Eventually down the line, Lagwiz rears it's ugly head and comes back at some point. Yes brand new Galaxy phones of late, have been fantastic, and fast and smooth. But 1 year later, they just don't seem to hold up performance wise like a Nexus / Pixel, or OnePlus phone. I have no idea why Samsung just can't seem to get their phones as smooth and fluid as a OnePlus or Pixel ? Especially as time goes by. I have two older OnePlus phones, and they are shockingly smooth still, and I have an old Nexus 6P, it too feels pretty snappy still, not nearly as smooth and fast as my Pixel 3 XL, no, but still not too bad. But old Galaxy phones, LOL forget about it.