I completely switched to the Adafruit Feather M4 series for my hobby electronics about 5 years ago. Each board might be a little more expensive than a base Arduino, but they are way more powerful and have a lot of great features.
Which boards are you thinking of? "Blue pill" STM32F103C8 boards are $2 to $3, if you're willing to run the risk of getting a cloned microcontroller. (The clones are actually quite usable for most purposes.)
Oh, those! I have one of the F401 models -- I didn't know there was a F411 variant, though, nor that they've gotten so cheap. There might be a purchase in my future. :)
