Either way it's another reason I don't touch (work on) microwaves if I can avoid them. The cap is supposed to have a bleeder resistor but I don't put any trust in it, especially in cheaper units.
Yeah, I've always felt uncomfortable working on microwaves, even though they should be perfectly safe if unplugged and capacitor discharged. I've only had to do it a couple times in the past, and I recall going to the trouble to wear welding gloves just to discharge the cap, first with 2 flathead screwdrivers and a resistor connected between them, then I'd check the cap for voltage using my multimeter, if volts were low but not zero, I'd short across with the screwdriver until zero and then place a short across it with alligator clips for the duration of my working on it.
I had to get into my Panasonic inverter microwave to repair some burnt wiring at the door switch, and was happy to see that inverter microwaves don't have that big capacitor. There are a couple of non-polarized poly-looking capacitors on the inverter board which I checked for stored charge and shorted across just for safety's sake, but they didn't hold any charge with the unit off. The entire board was very small and light-weight with what seemed like a much lower component count than conventional microwaves, it seems like a pretty nice improvement in technology.