There is no precedent in American pro sports for the relocation that the Golden State Warriors will make this summer from Oracle Arena, their unlovely yet beloved home in Oakland for the past 47 years, to the $1bn Chase Center, located across the bay near downtown San Francisco and stocked with all the amenities that 21st century sports fans supposedly require (luxury suites, locally harvested avocado toast) and that 21st century superstar athletes definitely require, like locker rooms that don't flood. For one thing, the Warriors are the first of two pro franchises that the city of Oakland will lose in the next 12 months. The Raiders will be right behind them, relocating to Las Vegas in 2020.