What is the point of AMP? Google could have made the web faster by just de-ranking slow sites, what advantage does AMP actually provide beyond this? The most g

What is the point of AMP? Google could have made the web faster by just de-ranking slow sites, what advantage does AMP actually provide beyond this? The most glaringly obvious change is that you never leave google now. There's a nice little wrapper around the site with a back button that leads you straight back to google without even a page reload. Oh but AMP isn't evil because it's open source. Open source but if you change a single byte in any file it doesn't verify anymore and arguably is no longer AMP. Google wasn't even planning to show the original URL at all until people made a shitload of noise about it. And it took a month to add because reasons??? It surely looks like quite a difficult feature to implement, showing a URL and all. It must have been quite challenging. I also enjoy the feature that there's no way to shut AMP off. Why would anyone want to? Maybe this is also to difficult a task for the AMP team to implement.