Glaringly absent in the aftermath of that day was any real shift within the architect and engineer community on doing much different than what they knew science supported then and now.
To me, it's a tacit admission from those lacking the fortitude; that what was constructed properly back then, and impacted less than worse-case-scenario, twice, did not fail and fall because they hadn't applied sciences properly back then, nor since. There had to be another explanation; it's just that fewer are willing to follow truth wherever it leads than the majority so far.
The Chechnya tower, being so close in height to Building 7, burning far worse than it, and NOT falling; likely isn't because of improvements in construction practices post 9/11; but if that still seems like a leap to you, well, then call me a jumper!
For my part, whatever anguish of spirit it may cost, I am willing to know the whole truth; to know the worst and provide for it. - Patrick Henry