Writing assembly language is a rather specialized skill that few people need to master nowadays. Being able to read it, on the other hand, I find really useful

Writing assembly language is a rather specialized skill that few people need to master nowadays. Being able to read it, on the other hand, I find really useful for debugging. You can follow execution into places where you don't have code at hand, find code that was not translated the way you expected (e.g. due to surprising aggressive optimizations), etc.