That's a gross oversimplification. From the video the poster provided:
* V16 of the Epsilon OS by Numworks removed the ability to install custom operating systems to the device in response to pressure from the Dutch education department, who had adopted the calculator as the standard for their education system. This was due to information provided by a different Youtuber accusing the platform of being used for cheating, and then provided modified versions of the OS that enabled cheating support by working around the Exam Mode functions.
A fair and true statement would be that the NumWorks calculator was originally marketed as open hardware, and that functionality was removed (similar to Sony removing OtherOS from PS3's).
