Gotta love ignorant fools posting online acting like they actually know what they're talking about.
The most surprising thing about this is they're actually planning on revamping D1A which hasn't been in use for manufacturing purposes in decades. It'll be interesting to see what they actually plan on using it for be it silicon, testing parts and/or packaging. Of course it's entirely possible that it won't be manufacturing at all.
Adding onto D1X makes perfect sense as they've had to redo manufacturing floors already for High-NA machines and I can't imagine things will be getting smaller. This was the first place EUV machines were installed before the primary manufacturing fabs were equipped.
The other bit that will be important to find out is the increase in emissions is permanent or including the construction. Doubling output permanently seems like it would be a pretty bad thing.