Comment by ndiddy

It's not intended for a normal person to use. If you're a normal person making something as a hobby project, you'll get a much nicer development experience by using a microcontroller that costs a few dollars rather than a few cents. For hobby purposes, I recommend either the Raspberry Pi Pico or the STM32 blue pill. A part like this is intended for inexpensive, high-volume consumer electronics that need some sort of simple control functionality. For example, let's say you're making an electric toothbrush. All it needs to do is turn the motor on, wait for 2 minutes, then pulse the motor to let the user know they're done brushing their teeth. This can do that. Or let's say you're making a promotional keychain, and you want it to blink a few LEDs in a specific pattern when the user presses a button. This can do that. If you take apart basically any piece of cheap (< $5) electronics that's been designed in the past 10-15 years, you'll usually see a tiny unmarked 8-pin microcontroller doing the control work. This part competes in that market.