They have a fab full of EUV machines which have been operational for at least 2 years based on public knowledge and the same fab has the first High-NA machine being installed. All of the advances happening so quickly are clearly because of the lessons they learned trying to do too much with 10nm and the huge advantage of EUV.
Still, Intel's experience is quite small to accomplish the advance they declare to be doing in so short while.
Let's see, Intel claims to be working in fully fledged production at their N4 process technology (7nm EVU).
We'll see how fast they accomplish their laptop and server CPUs that start being released (in a few weeks?) and should be fully deployed by 2023 Q1...
And then according to this article INTEL claims that "its process technology will already be joined by its Intel 3 fabrication node (3nm-class) in 2023 ~ 2024. This process will be manufacturing-ready in the second half of 2023".
Actually stating to be able to jump from 7nm to 3nm just like that! And then to do so in mass production lines.
It would be great if they can make it. Very unlikely if we see their trajectory so far.