There are many reasons: power usage, size, cost, availability being some of the main ones. I've been using microcontrollers for wearables and, as much as I'd li

There are many reasons: power usage, size, cost, availability being some of the main ones. I've been using microcontrollers for wearables and, as much as I'd like the power and ease of use of a Raspberry Pi, the size and power requirements can be too much to deal with. The Teensy 4.0 has proven to be a much better alternative for me - much smaller, lower power consumption, and still plenty of performance including a floating point unit which has been a game-changer.