What happened to all the typewriter repairmen when computers became ubiquitous? Certainly there will be upheaval in the labor market. I can certainly see union

What happened to all the typewriter repairmen when computers became ubiquitous? Certainly there will be upheaval in the labor market. I can certainly see unions and lobby groups pushing back against autonomous vehicles and delaying adoption. But I dont think its significantly different to other technological revolutions (the wheel, the transistor, the computer, the internet).