I was looking into these recently. The current batch of the nRF54L15's was recalled, so I wonder when mass availability will happen. It looks like an interesting upgrade to the nRF52 though.

The reason why I was looking at it is because I'm trying to hook up a 1kHz sampling ADC while streaming the data over BLE, and I need either a good DMA engine that can trigger on an external pin without a CPU interrupt, or a second core. I went down the dual core route, but I'd love to hear people's experience with DMA on the nRF52's and esp32-h2's and if it's finicky or not, and it's worth investing time into.