Many of them don't care enough about version control. Many of them don't care enough about unit tests. Many of them don't care about best practices and clean co

Many of them don't care enough about version control. Many of them don't care enough about unit tests. Many of them don't care about best practices and clean code. Some of them only learn easier languages (such as JavaScript and maybe Python, Ruby) while they should learn the more complex ones, too. Well, if they really are interested in becoming a good developer. There are so many books I would recommend to junior devs, but sometimes they simply aren't interested. Depending on the technologies, you should look for must-haves and read them.