Strategy for 10+ people downloading 1GB file over WiFi at the same time?

Hey all,

We have improved the WiFi a ton just from proper surveys, using the right channels and settings, etc - and roaming always works and video calls always look good. But there's situations where 10 people in a room need to download a large file, and it takes forever. Channel utilization immediately goes way too high (75%+) and performance is poor. Anyone ever work around this? It's an Apple environment with Cisco WiFi