“The new device is built from arrays of resistive random-access memory (RRAM) cells… The team was able to combine the speed of analog computation with the accuracy normally associated with digital processing. Crucially, the chip was manufactured using a commercial production process, meaning it could potentially be mass-produced.”
Article is based on this paper: https://www.nature.com/articles/s41928-025-01477-0
The thing which makes digital chips so much better than analog chips is something both you and the article are missing: noise. A digital chip is very robust against noise, as long as the noise in one step isn’t too big so it causes a bitflip immediately the stable configuration will pull the voltage level back and no information is lost. Not so with analog logic, since the information is continuous every step which introduces noice (which is basically every step) will cause loss of information. Go a few levels of logic deep and all you’ve got left is noise.