I think that, before making predictions on the future of YEC, we should perhaps ask ourselves some questions:
- Are the predictions substantive?
As @Roy has pointed out, two more YEC PhDs, out of the million PhDs awarded each year, is a mere drop in the ocean.
- Are the predictions consequential?
Will they have an impact on, or be indicative of, the prominance of and/or level of support for YEC?
It is hard to imagine that two more YEC PhDs will have a noticable impact on support for YEC, or materially improve its prominance.
They might give Tackett a slightly wider range of ‘talking heads’ to interview, but I suspect the average YEC-in-the-pew will neither notice or care. It’s hard to see even a ten-fold increase having much impact.
Likewise, I doubt if the average YEC-in-the-pew will notice or care if the claims being presented are on the basis of a formal (if inconclusive) study like Snelling’s, or on the basis of an off-the-top-of-his-head comment, like Neller’s. So even a fairly large number of publications isn’t going to have much impact.
- Are the predictions unambiguous and observable?
Even if a more substantive and potentially-consequential prediction were made, such as a 50% increase in YEC PhDs, how would we know if that had happened? AFAIK, nobody is tracking the number of YEC PhDs.
So, what would be a substantive, consequential, unambiguous, and observable prediction?
One example would be an increase or decrease, beyond the margin of error, in the percentage of YECs in the US.
Gallup polling suggests that support for YEC comes mostly from the more religious (61% from weekly+ church attendence, 24% from less than monthly) – which is hardly surprising, less educated (49% HS or less, 26% college graduate), and lower incomes (42% <$50k-pa, 30% >$100k-pa).
Given this, a long-term trend of the US becoming less religious, and automation reducing the number of lower-education/lower-paying jobs, I would expect a continuation of the long-term downward trend in support for YEC, with a possible blip in the Trump years, due to Trump-induced economic instability leading to a transient boost in religiosity.
I would not expect YEC to die out, but I would expect it to die down.