QuickBASIC could never replace Python

It's basically a useless language. You can not do anything with it that has substance, it is very limited in scope, and generally teaches some bad programming practices. (I don't have any examples, but I'm sure there are some.) Yes, it is good for learning the difference between types of variables and how some (sometimes awkward in QuickBasic) control structures work. But then again, you could do that in another language just as well.

Furthermore, Python is included with many Linux distributions. Remember how popular QBASIC was when it was included with DOS (also, ROM BASIC on early microcomputers)?

A complex program such as a HTTP server would be difficut to write in QuickBASIC, and it would be useless as one could be written in about 50 lines of Python.