USB4 ports and why are they needed?

Hello everyone,

Legion Go S is equipped with 2x USB4 ports... If currently all the Games are downloaded via Wi-Fi home internet, why do we need these ports...? I am looking for ideas...!!! Well, one idea just popped into my head - is to use 1 port for Operating System Reinstallation/Installation, via USB flash drive... Any other ideas?! Thanks.