Due to market pressures, 'we will buy $xxM per year guaranteed if you make this cheaper', Omron moved bulk of microswitch manufacturing to China. Japanese Omron

Due to market pressures, 'we will buy $xxM per year guaranteed if you make this cheaper', Omron moved bulk of microswitch manufacturing to China. Japanese Omron switches were 10M clicks in name only, they were build like Toyota builds cars. Chinese made ones all die around 10Million clicks which is around a year. Mouse is "just" $30-50, too little for someone in the west to bother repairing or even considering hassle of RMA. Logitech turned their physical products into recurring revenue business. There are mice with optical microswitches - you move a plastic knob that blocks the light path between two diodes soldered directly into mouse pcb. Personally I just replace switches regularly using a bag of Chinese $.5 Omrons.