Assuming the Arduino Nano clone isn’t using an amazingly high-quality EEPROM we can safely assume that most of us have nothing to worry about and our Arduinos will be functional for decades to come.

[Vinod] wrote his own custom bootloader for the AVR-based Arduino. With just enough memory to back up the AVR’s flash, the bootloader can shuffle the existing program out to the EEPROM while ...

However, Arduino also offers this board without headers ... flash memory of 32 KB, SRAM of 2 KB, and EEPROM of 1 KB. Its bootloader only consumes 2 KB of the flash memory, providing you enough ...