: X-Ray (seeing through blocks), Tracers (lines to other players), and ESP (highlighting entities). Performance Boosts
: Potion effect GUI (viewable outside inventory), FPS/coordinates toggle, and smooth camera zoom.
Today, developers have moved to legitimate modding (adding custom items, not cheats). But for those who were there in 2021—flying over spawn, crashing the school server with too many entities, and getting detention—that was truly the "best" era.