ELI5: Explain Like I'm 5

2×SaI

Okay, so let's imagine you're playing a really old video game on your computer or phone. The game was made a long time ago, when computer screens didn't have as many pixels as they do now. So when you play the game on your modern screen, it looks kind of blurry and pixelated.

But some smart people figured out a way to make the game look better on your modern screen. They created something called "2×sai." This is a special way of smoothing out the pixels in the game graphics, so they look more clear and colorful.

When you turn on 2×sai, the game will look like it was made for a more modern screen, even though it's really old. It's like putting a fancy filter on the game graphics, so they look better and easier to see. So if you're playing an old game and it looks kind of hard to see or not very pretty, try turning on 2×sai and see if it helps!