Botw Update 160 ((new)) -

"BotW Update 160" (1.6.0) is a minor, late-life patch that bridges Breath of the Wild and Hyrule Warriors: Age of Calamity . It offers no new content for BotW players but provides small rewards for those jumping into the Warriors spin-off. If you see it downloading, let it install—it won’t change your Hyrule adventure one way or the other.

Though not highlighted in the official patch notes, the 1.6.0 update utilized "boost mode" (overclocking the CPU during loading) to significantly reduce wait times. botw update 160

There is zero downside.