Any thermal mass in the bottom helps slow down that hi-lo effect (hysteresis) found in modern ovens.
It takes a little longer to heat up and cool down, but my oven varies by less than 10F rather than the normal +/-50F.
/johnny
They don’t harm the oven? Mine is a continuous cleaning oven that is really just a special finish what resists gunk. Stones might mar the finish. Still, it’s something to think on to use the bricks in SHTF. Most have sunk and disappeared around flower beds. Weirdest thing, can’t keep anything from sinking and disappearing in no time.