This is not Taliban getting into semiconductors, this is Japan who is already into semiconductors but lost its edge in this particular field but its leading in some other fields. Therefore they already have a considerable know how on mirrors and laser that they will have to improve on. IMHO the catch up will be much quicker and much cheaper than what the Europeans and Americans spent on to explore the path leading to what we have today.
I mean, that's true from a business perspective.
But they were trying very hard to make the next process node work. They went from a process upgrade every other design generation (the famous "tick-tock") to just tock-ing at 10nm because they couldn't get the next process generation working.
That was very much an engineering problem.
In many domains they do. Once the original creators are retiring or not involved, there are tons of tacit knowledge at every step of the way, from the high level abstract design to specific quirks of some manufacturing equipment, that's very hard to build back.
Until now it's just an announcement and some money thrown at the problem, so less than vapor.
> Why just twice as fast? Once you know that something is doable, it works and the rough direction things can get done really really fast.
I agree on the first part. The second part is full of details. The mirrors have to be just right. The lasers have to be just right. The timings have to be just right. There's a million other things that have to be just right and the path to get there may not be very parallelizable.