Pretty sure we have, e.g. [0], "TI's MSPM0Cx MCUs featuring Arm® Cortex®-M0+ core with 24 MHz CPU, 32-bit structure, 4 to 16 KB Flash provide cost-effective designs for electric toothbrush and shaver applications." - compared to the 5150[1], it's 4x the bus width, 5x the CPU clock, albeit with fewer RAMs.

[0] https://www.ti.com/lit/ab/slaaeg0/slaaeg0.pdf

[1] https://en.wikipedia.org/wiki/IBM_Personal_Computer

That insane new Dyson toothbrush definitely. It has on-device AI analyzing 28 fps video from its camera.

https://www.youtube.com/watch?v=tF2piG0N5gg