Yes - not saying it’s impossible to improve or that we shouldn’t add new things to the web platform, only that it always costs more than we anticipate.

One example: that’s great for Firefox but that helps a format become more common, which increases the likelihood of tools integrating a library but not using a browser-grade sandbox. How many apps end up passing user uploads through something like ImageMagick, for example? (And how many years will it be before the last container image is updated?)