An acquaintance of mine was laid off from Samsung. He was a rank-and-file ASIC designer and worked on FPU unit for Samsung's new CPU. Another acquaintance, a project manager in the silicon field, relayed that supposedly ARM developed a new CPUs that are so great, that all competitors gave up and folded their CPU development, resulting in the layoffs. The online sources have details.
In the same time they gave up on in-house cores, Samsung announced Exynos 990, a standalone version of the 980, based on the successors of the Cortex family, developed by ARM, of course.
As someone said on Glassdoor, "great place to work until you're laid off".