Do you use letters or email?

1. Do you use letter or email?From my perspective, most of the time I prefer to use emails in my daily life for the simple reason that it is quite convenient and high efficient compared to sending letters. And one of the advantageous of writing emails is that when you make some spelling mistakes, it is easy for you to correct them by deleting the useless words. But sometimes I like to write  write letters to my friends, which seem to be so unique nowadays. Because people are less likely to write letters to each other. So this may surprise my friend a lot.