Yeah, it's not completely out of question that it would blip the throttle, but it's not a very common feature either.

I drive an old piece of shit car with a very worn out synchromesh gear (it's a conical brass ring with grooves for friction - that wear out) so it's a bit smoother to blip the throttle a little when downshifting to the smallest gears. I don't heel-toe or left foot brake on the road (I'm proficient in both from simulator and performance driving), I just use my right foot to give a little gas. I rarely need to brake and downshift at the same time unless I'm in heavy traffic, I mostly rely on engine braking controlling speed.

Outside of performance driving or old worn out cars like mine, there's no real need to rev match on normal road cars.

How does the clutch in your car work? In an unsynchronized gearbox, you'd double declutch and blip when the clutch is up and gear is neutral (to rev match gears inside the gearbox). Is this thing just to match the engine and gearbox input shaft speed? Not gears inside the box? Or does it do something similar to double declutch w/ heel-toe?