My NYC friends like to point out that they've had all these on demand services available for decades. The key is having enough people who value their time more

My NYC friends like to point out that they've had all these on demand services available for decades. The key is having enough people who value their time more than their money at some ratio where the service had enough volume to support itself. NYC naturally had a high concentration of such people. Sf bay area has Leveraged phones to make things work with a lower density of such people.