It was a lot of tank shells and mortar rounds. The tank shells make sense if you hear how they use their tanks in Gaza. They just fire at every building and suspicious rock they see.

Tank shells are a lot cheaper and faster destruction wise than plane bombings. Same for mortars, dumb cheap weapons useful for just destroying buildings.

And likely some stockpiling because Netanyahu has been trying to start a war with Lebanon for a while now and if he manages to escalate it that far then israel will need a hell of a lot more than just their current reserves.