Yup!
I am one of them, I am constantly using appinventor, because (in one way or another) I teach children how to think programmatically and solve problems with logic, mathematics and technology, because my country lacks time in many areas.
and MIT appinventor helps me a lot, a lot, a lot... in the task.
Although I'm always reading the forum (to see what's new), I don't always write.