The Legend of Zelda: Breath of the Wild (BotW) received its Version 1.6.0 update on April 25, 2019, primarily to introduce technical support for the Nintendo Labo VR Kit. While it wasn't a content-heavy expansion like the DLC packs, this update was a milestone in Nintendo's experimentation with virtual reality on the Switch hardware.  The VR Integration 

If you’ve only ever played the cartridge without updates, you’re on 1.0.0 (the land of flying trees and infinite arrows). If you download the patch today, you’re on 1.6.0.

Accessibility: The feature could be toggled on or off at any time via the game's options menu.  Technical Adjustments 

• Vanilla 1.5.0 on emulators suffered from "shader stutter" and armor rendering glitches.
• Update 1.6.0 introduced a more stable memory heap. For emulators like Yuzu and Ryujinx, this patch reduced random crashes by nearly 40% and fixed the infamous "infinite loading" bug when entering Shrines.