The main kick is that there is not a way to "rewrite" a foxpro app without tons of stuff along the way!

(Example: You can ship an app that internally run `CREATE REPORT` and the report builder show up. You can invoke the debugger (that as I remember is the best I used a zero alternatives as good existed)) and so on

The runtime didn’t contain the debugger or other dev tools, only the dev version/IDE did. It did contain the report writer, though.