Question on Quora

For anyone who uses Quora, there is a thread below.
I am looking for a reference to the ballista/catapult example where SciML and Flux are combined.
I think this was a talk by Chris Rackaucas - but cannot find the exact one.
A canonical JuliaCon presentation on composability would be appreciated.

https://www.quora.com/What-will-replace-or-replaced-Fortran-in-extremely-high-performance-numerical-computing