Meanwhile, Intel's chip designers kept targeting an unusable process, and wasted years that they should have been iterating on designs for the fab process that actually worked. Skylake shipped in 2015. They didn't deliver a new CPU microarchitecture on 14nm until 5.5 years later, a year and a half after they shipped that same microarchitecture in a mobile-only form when their 10nm finally started to be somewhat usable (but not fast enough for desktop).
What were the chip designers doing for all those years? In 2015, Intel knew that 14nm had been harder to bring up than any previous fab process, and they knew that 10nm was proving even harder, but they refused to try making an updated CPU design for 14nm. How could the management not have realized that spending multiple consecutive years not shipping new designs would cause long-term damage to their capability to iterate on CPU designs? Not participating in the feedback loop of actually shipping left Intel with an oversized P-core design and an E-core design that wasn't well-matched to it, making Alder Lake awkward and slapdash when they finally got 10nm working well enough for desktop CPUs.