I explicitly pointed out what the article was lying about.

"You cannot see how fft or ode45 are implemented under the hood." is a totally false statement. You absolutely can do exactly that. This is not a matter of opinion. Right click the function and open it, you can view it like any other matlab function.

> From perspective of open / closed source -- maybe for you it qualifies as open source

Matlab is obviously not open source. Who said anything about that? The article claims you can not audit ode45, that is false and it seems pretty embarrassing for someone speaking authoritatively about matlab to make such basic claims, which every matlab user can disprove with two clicks. Every single matlab user has the ability to view exactly how ode45 is implemented and has the ability to audit that function. This is not a matter of opinion, this is a matter about being honest about what matlab offers.

Seeing in MATLAB code how ode45 is implemented != how the thing is running on the machine. That's a very small top slice.

But okay -- as I mentioned, you're entitled to your views!