You have some performance comparisons, but I'd like to see a table of the features it has over the mainstream frameworks. Is everything in the list at the top of the article something neither Flask nor FastAPI offer?
The main thing that none of the frameworks you know offer is being small enough to also work under MicroPython on $5 microcontrollers. I created Microdot a few years ago when I wanted to have a web interface to configure a thermostat that I built to control the heating in my house.