"Flipper turns hacking into a game, reminding you that hacking always should be fun." Tell that one to the state prosecutor when you're arrested for 'pen testing' with a cloned RFID tag.
There's a replay attack feature for 433Mhz traffic, but most of the 'interesting' stuff is on other ISM bands. As for the STM32 processor, I hope the world hasn't run out of chips already... or there will be some dissapointed early birds.
Flipper Zero is, "Arduino IDE compatible." I thought this was meant to be a *fun* toy?