Reaching level 99 does more than inflate a number. It allows you to equip any weapon or armor without level restrictions. Additionally, your damage scaling against level 52 enemies becomes comically overpowered. In "high quality" mods, the XP curve is also fixed so you don't need to grind—you reach level 99 after the tutorial.
A high-quality mod menu typically provides a toggleable interface that allows you to activate several game-altering features instantly: Reaching level 99 does more than inflate a number
Modern mod menus like those found on ShadowAPKs or Modded-1 typically include: Reaching level 99 does more than inflate a number