I authored an article three years ago.
Arm SoC with FPGA in the silicon package or SoC.
I wanted unified RAM between the Arm cores and FPGA.
Two to three years on, we have Apple M1 which I have been daily using since its delivery in December 2020 in my top-of-the-range launch Apple Mac mini M1.
I would like to see a pro-user programmable FPGA in Apple's M2 Max SoC if Apple continues its nomenclature.