What metrics are you thinking of? Page size and load speed are the typical ones. There may be some wrinkles to measuring those well, given how dynamic modern pages often are. That would make any such metrics relatively easily gameable. It might also be challenging to turn measured improvements into measurable gains in SERPs, which means the gains in corporate politics are limited.
AMP avoids all of that. It also brings security benefits by getting rid of basically every tag that can be used to mount attacks on the browser.
Also, it's been known for quite a long time that users like faster sites, resulting in much lower bounce rates. Was that not enough for you to optimize the hell out of your site? It's been my experience that in a lot of companies, it isn't enough. Marketing or publishing or whichever department can attach dollar amounts to the tracker or ad or whatever they want to add, and devs can only handwave around experience.
AMP avoids all of that. It also brings security benefits by getting rid of basically every tag that can be used to mount attacks on the browser.
Also, it's been known for quite a long time that users like faster sites, resulting in much lower bounce rates. Was that not enough for you to optimize the hell out of your site? It's been my experience that in a lot of companies, it isn't enough. Marketing or publishing or whichever department can attach dollar amounts to the tracker or ad or whatever they want to add, and devs can only handwave around experience.
It's not a winning proposition.