From I've seen they certainly used that initially with mostly older, cheaper, and slower drones in the initial waves intentionally to bleed out the iron dome but have been changing their strategy as the "Iron Dome" is weakened and/or gaps are discovered.

With each wave they adjust their strategy. Interspersing more Hypersonics and layering the drones in different patterns/locations to more readily distract/avoid the iron dome.

From estimated ratios of 9 impacts out of/150 launched in the first few waves vs 9/50 in the more recent waves.

Though obviously Israel hides the damage/strikes through media blackouts on military sites so we can't know for sure how accurate these estimates are and we mainly only get reporting on impacts in Tel-Aviv or other militarized "civilian" zones.

And the numbers are staggering. I forget exactly but those early retaliations for assassination last year that where laughed at expended something like 100s of millions of dollars.