"U.S. officials say a key driver behind this decision is a fear that America’s industrial base cannot develop and produce two different advanced stealth fighters simultaneously."
So its official. They acknowledge that their industrial base may not be able to match that of their greatest rival, and so have pragmatically chosen to focus on a single 6th-gen fighter project rather than try two and fail at both.
The only headscratcher is why they've decided to focus on the USAF fighter and not the USN plane. America's lack of strategic depth in WESTPAC means that even if they had the best land-based fighter in the world, it would be hard-pressed to fight without safe bases where it can launch with combat loads. Having their only 6th-gen fighter be the Navy's carrier-borne mainstay makes sense, it being essentially an F-22 replacement that also cannot fight over the Pacific does not. Unless they really believe the F-47 will have revolutionary improvements in combat radius?
I think that prioritizing the F-47 makes sense. Its program is likely quite a bit further along and the US is in pretty desperate catch up mode right now. The other issue is that the White House and the Pentagon have deemed the Western Pacific as the most crucial battleground.
The problem is that it's so far away from the US that it's really hard to project power that far against someone that can fight back. Right now, the USMC and the Army are desperately trying to find a reason for their existence because they are useless in the Western Pacific. Even the USAF has a really tough time because the basing in the region is so poor that only a tiny portion of their fleet can be employed. The F-22 is their primary air superiority fighter but it has such short legs that it simply can't reach the battlefield. One of the most important features of the F-47 is that it's supposed to have a very long range. If it can do about 1000nm with a combat load, then it would be able to go from Guam to Taiwan with a single refuelling in between. It's not exactly an ideal solution but beggars can't be choosers.
In comparison, while the Navy is the most important arm, it already can send F-35s into the fight. Sure, having a better plane would be ideal but getting the USAF involved is more important. Still, this is not a promising development for the US. It increasing feels like they just can't make things any more.