Based on what we learned from AMP, we now feel ready to take the next step and work to support more instant-loading content not based on AMP technology in areas of Google Search designed for this, like the Top Stories carousel.
You can't do it now, nor is it clear exactly how you'll be whitelisted, but apparently Google is open to it. The ticket in will be utilizing hopefully-someday standardized things like Feature Policies, which, like AMP, disallow certain features in the name of... well that's the thing. It used be be in the name of speed, but the messaging seems to be more like in the name of privacy and security now. Also a good goal, just funny that "Pages" is about the last thing left in the AMPcroymn. Sorry.