Processor development has always been a “black box.” I would bet good money that as quantum computing becomes more accessible, these types of hardware exploits will become more common and easily exploitable on aging platforms.
Yeah - but as a low level developer we’re well aware of that fact that you don’t leave encrypted items in memory “lying” around because it’ll get exploited in your app.
It’s just unfathomable (though probably not that surprising) that the processor manufacturers never implemented that in their designs.