Are console based apps still viable these days?

I mean, who still uses them and writes them by choice?

I'm writing a Minimum Spanning Tree calculator app which is command line driven. It probably isnt worth writing a proper GUI for because its pretty straight forward. Just pass a filename into the program and a few minutes later a new file is created and the ser is prompted for another filename. I'll need to write a windows app to interpret the results of course.

If I packaged these 2 programs together and tried to sell it, would people really not buy it because part of it is commandline driven?

What are your experiences / thoughts?

Discuss