This article is 8 years old, but the story is the same: TI took the time to create a moat around schools, originally by helping teachers integrate the calculato

This article is 8 years old, but the story is the same: TI took the time to create a moat around schools, originally by helping teachers integrate the calculator into their lessons, and then getting TI84 methods written into textbooks, and then eventually by aggressively going after alternatives like TI84 emulators on smartphones. Wabbitemu for example is excellent but a bit like asking Grandma to install openbsd because they have to be so careful about pissing off TI.