peripherals are a dumpster fire. I usually have to resort to bit-bang if i want to use the peripherals in a slightly different way than intended. Way easier than figuring out all the "drivers" thing to see if it's actually possible. Also, the couldn't make a decent ADC if their life depended on that. I use them for projects that require radio and GPIO, or slow PWM, or low accuracy ADC, or screens (but only with the preapproved screen controllers)