and EEPROM of 1 KB. Its bootloader only consumes 2 KB of the flash memory, providing you enough space for your sketches. In addition to this main processor, the Nano also has another chip on board ...

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.