The fact that Java was device-agnostic due to the JVM is something that Microsoft viewed as a threat. Bill Gates saw Netscape as a threat with their plugin syst

The fact that Java was device-agnostic due to the JVM is something that Microsoft viewed as a threat. Bill Gates saw Netscape as a threat with their plugin system because of the idea that the OS would just be a shell to the browser which would run programs via plugins. This one of the reasons that they wanted to destroy the Internet. They feared that it would make Windows irrelevant. "Write once, run everywhere" is a threat to a company whose entire business model is based on "everywhere" being owned by them.