Four things:
On the generic basis the Big-Data valuation modeling still has many or all the challenges that existed with that usage in 2005, including the usage of data that nobody has rated for quality and condition and appeal and such. Some advances but perhaps not enough to make a difference. Zillows Zestimator is often unreasonable.
The other modeling the lenders and GSEs used - which you are referring to - wasn't about individual appraisals at all. They were separating and selling off tranches of those loan bundles based on the model's risk ratings. That's not an appraisal failure as such except to the extent the actual 1004s were out of line, it's arguably an underwriting failure in not identifying the problems with what some of the appraisers are doing. Whatever they're doing in 2024 with selling off tranches of their MBS trade still has the similar potential for problems and it would still amount to an underwriting failure.
What's a little different now
The technology to suss out more of the physical attributes off a pic is a far more recent development which is wholly unrelated to the problems the commercial AVMs have with using public record data; and
When it comes to the GSE AVMs they aren't limited to the same data sources that the commercial AVMs use - they have access and are using appraiser-developed data including the pics that software is analyzing. And that appraiser-fed data isn't just limited to however many appraisals they have on hand for the subject property but also includes the data the appraiser collected/qualified for most or all of the comps that they presented as comps (inclusive the appraiser-vetted data in each of THEIR respective appraisals). I daresay the appraiser-vetted data is what makes the GSEs AVM a whole different beast of its own, to which many of the other AVM criticisms might not apply. Leastwise to the same degree.
TBH, I have to cringe a little every time someone complains about the alternatives that the CU system spits out because it implies - among other possibilities - that perhaps other appraisers conveyed different ideas about the comps they were using in their own appraisals.