Why isn't dishwasher a mainstream household appliance in Kerala?

I understand that having a roomba, a dryer and other appliances can be a bit of a learning curve for some but a dish washer is as easy operating a microwave. And almost everyone knows how to operate those so what's really stopping this technological jump? This would reduce the stress for whoever has to deal with the dishes, family members or the house help. You can just order dishwasher tablets and learn how to properly load it. After that it's so easy. Buy extra plates if needed as well. Every house that has a washing machine and microwave should ideally be able to operate a dishwasher without issues no? People who have dishwashers in your homes, tell me your feedbacks, do you still use it? If not why?