From Kazakhstan here. Didn't use cash literally for a couple of years. AT ALL. Almost everything can be paid via mobile app (though basically only one bank - Kaspi bank). Products (including dill at bazaar), taxi, even public toilet - everything can be paid via transfer from one Kaspi client to another.
UPD: But cash is still accepted in most cases. Have no idea why some people still use it.
UPD: But cash is still accepted in most cases. Have no idea why some people still use it.