NYT OpEd on Quantum Mechanics [QM].
Not only is QM now not explainable, scientists have taken the stand that anyone who tries to explain it should be counted as out of the bounds of science. Therefore anyone who touches it loses his grands for research.
QM mysteries took a sharper turn in the late 90s and early 2000. That's when I was following it.
Basically right now if you want to touch the explanation of QM, you need to talk on God or at least "Intelligent Design". That's a no-go zone for science. They are scared.
That's my take anyway.
https://www.nytimes.com/2019/09/07/opinion/sunday/quantum-physics.html
https://www.nytimes.com/2019/09/07/opinion/sunday/quantum-physics.html