Applets suffered a spin up of the mini VM time. And applets couldn't affect the rendering of the html page, they had their own 'canvas'. I rather think JS was

Applets suffered a spin up of the mini VM time. And applets couldn't affect the rendering of the html page, they had their own 'canvas'. I rather think JS was more appropriate as dev found more use in dynamically altering the very html markup that users saw, and after it was actually rendered.