Well he said he has been pitching large casting to OEM for a decade+ and then he sent a free suggesting excel table to Tesla after their analysis.

Within less then a year Tesla was pushing hard into that technology and invested many 100s of millions into it.

We don't of course know if Tesla did that because of his suggestions but they did 'the right thing'.

He also just bought a Rivian so he clearly is happy for all well engineered products.