Ancient history but I wrote an article way back when for Microsoft’s MSDN magazine. Because Silverlight was strictly 2D at the time, there was an opportunity to leverage a lot of the mathematics that nowadays is hidden away in the GPU hardware or the 3D canvas in HTML5.
Silverlight is no longer with us but mathematics is of course eternal and I include a link in case it’s of interest for other animation or education projects:
For those who want more than speculation, here's the Wikipedia article (complete with references):
https://en.wikipedia.org/wiki/Salvatore_Pais
Spoiler: It's not looking good for the "Pais" effect,
