https://asia.nikkei.com/Business/Tech/Semiconductors/TSMC-to...
The stories I've heard about what it takes to build a single machine would suggest to me that scaling up would be a huge feat and I could only imagine take years to accomplish.
Then again, perhaps TSMC and their peers had predicted this kind of growth and already placed their orders long ago?
TSMC is upping their investment in the US, but I agree with Morris Chang that the US operation won't be as lucrative -- ie, thye won't be able to maintain 50+% profit margin. Further, TSMC really didn't have any competition in the last 2-3 nodes and Samsung was largely absent in 7/5/4nm, but Samsung is going mass production with 3nm GAA pretty soon and TSMC is going to have to put up a good fight to maintain their dominance.