The Nano Every is a pin-equivalent substitute, so previous code and wiring will still work. Arduino has also swapped out the Nano's mini-USB connector in favor of micro-USB.

“Based on the ATMega4809 AVR processor, the Arduino Nano Every is flexible to the requirements of your design. It can be used in a breadboard when mounting pin headers, or as a SMT directly ...

The most basic model in this lineup is the “Nano Every”, a 5V board with the ATmega4809 at its center. This brings 48 KB of flash and 6 KB of RAM to the party, running at 20 Mhz.

The Arduino Nano and Raspberry Pi Pico have distinct pin configurations. The Nano includes 14 digital pins (for both digital input and digital output components) and eight analog pins.

The incrementally improved and cost-reduced “Arduino Nano Every” is likely to be pretty popular. ... 3.3V “Nano Every” please and put the silkscreen pin labels on the top of the board.