… or maybe that should be ‘forgiving’.
I was just trying to program my A1 (which was happily blinking 2 LEDs). The software said it couldn’t recognise the FPGA. It turned out that when the +ve wire from the battery pack fell out of my breadboard, I’d plugged it back into what should have been a 3.3V bus instead of my regulator’s input. Oops! Battery wire connected properly, the A1 programmed.
If FPGAs could wear T-shirts, mine would wear one saying “I survived 5.9V”