Modern technology is partly responsible. A dozen CCTV cameras, monitored alarm. Multiple PS4/PS5 for the kids. Including large screen TV's.How bigs your house? 5-600 a month!!
Then Echo devices in each room, running 24/7.
Then the normal shit for five people, like washing machine/dryer. Summer (small) pool heating.
Trust me, it was killing me. Hence the relief the new overnight tariff was giving me!