The new bricks came out a couple of years ago, they were out of production for some time before that. I suspect due to component shortages they replaced things like the relay, and also the UL requirements needed the connector switch that has been discussed here before.
I have never had my hands on one of the new bricks as I have a bunch of the old bricks purchased on the used market. Cheapest I ever got one for is $50, most were $70-80. I have four on my layout, and three more waiting in the wings in case I need them.