You cite "a professor", and this article is also about a singular professor. That implies that this is the exception, not the rule. Students have ample opportunities elsewhere for exposure to "enterprise commercial software".
The delta between Jitsi Meet and Zoom or Teams for video-conferencing is minimal from a user experience perspective. The idea that a CS graduate from MIT would struggle to figure out Zoom or Teams at their first job is laughable.
Correct. This is also why you do not need to cast the result of malloc(). An assignment of a pointer to void to another pointer initiates an implicit conversion.
And it is actually somewhat dangerous to cast the return value of malloc. Aside from being redundant it can hide an error on compilers which implement an older version of the standard (not uncommon. Anything pre-C99).
If you forget to include stdlib.h the cast hides the error and malloc will be assume to be a function which returns int. makes for interesting runtime errors.
Never cast the return value of malloc in C, and don't write redundant code. C is not C++.
(I believe the Xilinx-forked kernel uses a derivative of these patches)