The most salient issue with Intel in the past 10 year was their constant delay of the 10nm node process. While TMSC was constantly pushing down the Node size, Intel struggled and ceded a lot of ground to AMD & Apple. At the same time Intel struggled to develop a competitive 5G radio, and GPU.

These are all downstream of R&D. If your fab cannot shrink it's node size, then you won't get the most profitable orders.