OP here, Fit on a Floppy is something I decided to build for visualizing website file size. Something for fun after one of those late night domain purchases.
Next up: registering the canifaxit.com domain.
Take a picture of any object, use DNN classifier to report whether it can be faxed. Test on watermelon. Equally relevant to modern web development.
Granted page size isn't the be all end all for performance but I think it is definitely a useful metric.