Why does Vanilla need to be in 1.2.3 too?

[ThymeLordWho]

I get that the mods are for 1.2.3 still, so the Tekkit, Technic, Yogbox, and Voxelbox need to be in 1.2.3. Why can't it launch vanilla in 1.2.5?

[Ilan321]

This is exactly like Bob kelso's suggestion box from scrubs..

[jakj]

Because you can use your .minecraft folder for 1.2.5, but this way, you can just basically copy the Technic Pack with/without some mods, stick it in your Launcher vanilla, and have two vastly-different mod combinations running at the same time.