Over the last few years, we’ve seen a huge growth in the number and variety of both microcontroller boards and single-board computers.
The modern era, defined by microcontrollers becoming conveniently packaged on boards, began with the Arduino. The “classic” Arduino layout, including the irritating, irregular offset between pins 7 and 8, has become a standard. Similarly, the Raspberry Pi’s layout has been imitated, with several newer boards duplicating it exactly.
The microcontroller board market is in transition.
The era of expensive and badly documented developer boards for the professional market have given way to cheaper microcontroller boards that are far more easily accessible. That’s been good for everyone.