The writing was on the wall for Intel more than 7 years ago.
By then:
- Intel's 10 nm node was known to be two years late and known to be plagued for many others while TSMC had already taken the crown for most advanced foundry on the planet
- Apple announced their work on phasing out Intel hardware completely for their own ARM SOCs
- AMD had launched Ryzen, back then a bit slower in single thread but already much more competitive in MT
- Supercomputers and crypto showed the ever increasing possibilities of GPUs for heavily parallelizable calculations and Intel had nothing to offer there
- Cloud providers building their own hardware on ARM