Lots of interesting tidbits in there.
We already know that the F-22 is going to be obsolete for its role in the near future, the USAF admitted the same a few years ago and this was repeated in the article again. It's why the USAF resisted reopening of the F-22 production line. Not to mention, while supporters of the F-22 were calling it a bad idea, they didn't know that the NGAD had progressed significantly, to the point where a TD is already flying.
The oft repeated issue of the F-22 was range, and we know that the USAF is looking at very high range for the NGAD in order to penetrate deep inside Chinese airspace, also to escort the B-21 inside Chinese airspace when the time comes. I suppose the USAF want the NGAD to be able to manage at least 2.5-3 times more ferry range than the F-22. This will allow it to operate from Guam and fly all the way to Chengdu and back. Similarly, they will want to be able to reach Delhi from BIOT. Or deep inside Russia from Europe or Japan.
Then we also know that the F-22's IWBs are not impressive enough for the USAF anymore, so the NGAD could have much bigger IWBs instead. With the need for very high range and very high payload, the NGAD will likely no longer be a traditional fighter jet. We may be seeing a flying wing design instead. So agility may no longer be important. But speed will be extremely important, so it's not going to be your traditional flying wing design, it could be a bit more radical, with highly swept wings.
With the US seemingly intending to operate only 4 jets, presumably after 2040, or even 2035, this can drastically reduce their spending on sustaining their current zoo, allowing more money for the punch. Also the F15s and F-16s are going to be in small numbers, only a few hundred, so most of the fleet will be NGAD and F-35 after 2035.
And lastly, the F-16 replacement, if a decision is going to be made only 6 or 7 years later, then it's obvious the planned induction date is around the mid 2030s, and timed to replace the F-16 before the planned date of 2048. It could eat up some of the F-35s as well. So it's unlikely the USAF's F-35 fleet will be anywhere near 1763. Won't be surprised if this jet ends up being better than the F-35. Hell, won't be surprised if they end up with a single engine AMCA.