1.2.6 Alpha !!better!! — Minecraft

Alpha 1.2.6 was primarily a stability patch to polish the game for its Beta transition. Notable fixes from the Official Minecraft Wiki include:

Here is everything you need to know about the quirks, features, and lasting legacy of Minecraft Alpha 1.2.6. minecraft 1.2.6 alpha

In an era of deep dark cities, wardens, archaeology, and netherite, why would anyone go back to a buggy, featureless version from 2010? Alpha 1

A significant portion of the update was dedicated to fixing the "chunk-loading" issues and inventory glitches that plagued earlier Alpha builds. minecraft 1.2.6 alpha