https://www.quora.com/Why-is-Turbo-C++-still-being-used-in-I...
But I'll do one better -- here are a couple of syllabi and course materials that suggest that it's still being actively used in universities:
https://www.darshan.ac.in/DIET/CE/SubjectDetail/2140705 (note the "reference books")
http://cmscollege.ac.in/course-menu/syllabus-object-oriented... (similarly)
http://www.alagappauniversity.ac.in/modules/DDE/uploads/book... (published in 2018, references Turbo C++ throughout)
http://www.dbit.ac.in/cse/syllabus/compiler-design-lab.pdf (2017, references Turbo C++)
You can find more examples pretty easily. It does look as though some universities are starting to support the Code::Blocks IDE and/or Geany, but not consistently.