That all makes good sense.
It'd be nice to know approximately how long things would last, but there are so many materials, glues, and other variables that it's kind of hard to even guess sometimes :)
You are very correct.....
Even with a tested material one can never be sure as conditions the print is exposed to is beyond the control of the photographer.
And we would all like to know if the 3M glue or the Walmart glue will last beyond the end of the day. Groups do test, but in the long run those "tested" products will cost more. And in many cases, a lot more just for the knowledge that it is a better product. You and I can only make a best guess estimate and move forward.
As an example, did a quick test of IJA MC Luster with iPF5000 inks. No issues with running water. A 12 hour soak did make the ink soft and easy to rub off. After drying (the paper is now warped) the ink is once again rub proof. And have a sample in a south facing window for a month. No color change from the covered to non covered side. Good scientific controlled tests - not by a long shot! But is good information to know in place of real scientific information. Helpful, maybe!