Yes there were very serious software written in different Basic dialects. One that I was interacted with was a CAD software written in QBasic. It was about civ

Yes there were very serious software written in different Basic dialects. One that I was interacted with was a CAD software written in QBasic. It was about civil engineering and static analysis tool for concrete buildings. You could export projects to dxf format so you could import into AutoCad to fix bugs and plot. Funny how the name was MGCad and author insisted it stood for MegaCad. I suppose It was a nice coincidence that the Author's initials were MG :)