Set this to true if you want Terminal to fallback to the user's existing native terminal in the event that creating the custom terminal is impossible for whatever reason.

If your application must have all advanced features, set this to false. Otherwise, be sure you handle the absence of advanced features in your application by checking methods like Terminal.inlineImagesSupported, etc., and only use things you can gracefully degrade without.

If this is set to false, Terminal's constructor will throw if the gui fails instead of carrying on with the stdout terminal (if possible).