The mystery that is EEPROM storage

Yeah, although I just found out how limited storage it is. I tested it for 8192, but when coding for a device using rfid tech, I came across severe problems in terms of reading the data. It was a senior engineer who let me know that they would describe EEPROM as moody and only safe bet is to use 512 as EEPROM storage sizes. Sigh. I guess there is only two ways trying to figure out LittleFS/Preferences or buying another EEPROM external.