They won't have to. The market would naturally have big players find it in their best interest to organize spectrum interference around their usage, and would avoid ranges used by other big consistent players in a region. The average consumer should barely see any change, besides variable range on their devices as other hardware comes up and goes down in a frequency band they use.

But for use cases that require consistent signaling, or really high throughput, enabling radios that utilize vast swaths of frequencies in parallel can increase the throughput.