...I'll put myself on the spot here (gladly, as it will allow true experts to throw rocks.)
But while RF-frequency ('gigahertz class") DACs' state-of-the-art today is about 20 bits, I thought that low-frequency audio DACs (and digital filters of DAC SoCs) are at least 24bit, and might even be 32 now...? While still 'of consumer prices'..?
Where do you get the idea that RF gets to 20 bits?