Because it lacks the Ender Dragon or formal advancement system, 1.7.3 is viewed as a pure "sandbox" where the player dictates the goals, rather than following a set path. 2. Nostalgia vs. Revisionism (The 2021 Trend)
You can easily access Beta 1.7.3 directly through the official Minecraft Launcher: Minecraft Beta 1.7.3 Download Free 2021