There is a new SmartCardHSM SIM-Card available out there - with version 4.0 it is now using flash memory instead of EEPROM and should apparently be faster.
Will Niktrokey HSM 2 be upgraded to use the new one? Is it possible to order SIM-cards only somewhere and replace them on my own? (not sure if cardomatic.de sells old or new ones now, the description doesn’t say).