Softbank was startled by large signups for fixed wireless in Tokyo, a city with almost 100% coverage of fiber home. T-Mobile in Austria has also seen a trend.
The new customers were primarily young. They wanted a service they could take with them if they changed apartments. The fiber connects and reconnects are a headache.
Softbank has nominal speeds of hundreds of megabits and practical speeds of at least a couple of dozen megabits in most of Tokyo. That is enough for most people, most of the time.