You should avoid it if:
A "portable" version of Minecraft Alpha refers to a self-contained folder structure. Unlike the modern Minecraft Launcher, which stores data in your system's AppData folder, a portable setup: minecraft alpha 103 02 portable
Corrected a bug where the player's body would rotate incorrectly in third-person view. Minecraft Wiki of Minecraft Alpha or other popular in-game myths Alpha 1.0.3_02 | Minecraft CreepyPasta Wiki | Fandom You should avoid it if: A "portable" version