The author has listed quite a few like unicode and 64 bit support ^^

Those are both good examples!

And the VB6 compatible twinBASIC programming language supports unicode and 64 bit compilation - and has a modern IDE. And it can import VB6 source code and forms.

I still have a VB6 program in production. I miss a nice `sort` function.

Also opening the standard window to open/save a file is a missing feature. You can use a vbx control but it's difficult to distribute, or you can use the API, but the null characters are a small problem.