I don't think they've revealed *THE* problem with their 10nm process, but it seems to essentially be that they are having so many defects on it that they can't make reasonably large chips or chips ...

Intel released the 80286 processor on February 1, 1982, making the CPU 44 years old. According to the company, the 16-bit chip represented a significant evolution ...

Set in the heart of Silicon Valley, the Computer History Museum long cheered the developments around it. Now, it’s taking a more nuanced approach. Credit...By Loren Elliott For The New York Times ...