Basically the title sums up my idea.

Right now we can load maybe 6-10 webviews before the page lags too much on load.

If the pages didn't autoload, and instead had an image placeholder until you click the webview... this would significantly reduce the initial loading lag.

For code, just do it exactly like video assets that are on an object. It uses the object textures until you click it, then loads the webview. Autoplay="true/false" would go on the webview asset, not the object.

We could put 100s of different webviews in a room , if we had this.

As an example, imagine a retail store in Janus... Where every item would have a non autoloading webview with ordering info right next to the object. Sign into amazon/pier 1/whatever at the entrance, and cookies would keep me signed in on the new webviews at the item. The non autoloading webviews would display an image placeholder with various bits of info (like price, shipping estimates, technical specs, etc).