I was formally trained in auto body repair decades ago. We were instructed not to use the terms Bondo or plastic filler. We were told to call it Auto Body Filler. or Body Filler for short.
Bondo got a bad rap in the early days... and that was mostly due to people not using it properly... poor prep. Today it's about as good as any filler. Arguing Bondo vs. Evercoat or others is like starting a "favorite oil" conversation.