Samsung stopped their own CPU development a couple years ago.
I wonder how it costs in this chip warfare context. Maybe not a lot because the layer is different, but the moral level in the field might not as high as they hoped.
Samsung stopped custom CPU core development because their cores weren't very good and because ARMs got better and their R&D cost is shared amongst the industry.
Samsung still makes CPUs, they just use licensed ARM cores.
[1] https://www.anandtech.com/show/15061/samsung-to-cease-custom...